# How do the frequencies and the speeds of yellow light and blue light compare?(1 point)

Which of the following is the best answer?

a) The frequency of yellow light is greater than that of blue light, while the speed of blue light is faster than that of yellow light.

b) The frequency of yellow light is greater than that of blue light, while the speeds of both colors of light are the same.

c) The frequency of blue light is greater than that of yellow light, while the speeds of both colors of light are the same.

d) The frequency of blue light is greater than that of yellow light, while the speed of yellow light is faster than that of blue light.

## I aint brave enough to use them answers so I'll js post what I got.

Waves Unit test btw for honors (24 questions)
1. Light waves do not require a medium to propagate.
2. As a wave's frequency increases, more energy is carried by the wave in a given time period.
3. The frequency of blue light is greater than that of yellow light, while the speeds of both colors of light are the same.
4. the vertical distance from the crest or trough of a wave to the equilibrium
5. wavelength
6. Shorter wavelengths correspond to lesser density of the water./ Longer wavelengths correspond to greater density of the water.
7. 0.2 seconds
8. λA=1/3λB
9. 17 m
10. wavelength of the stationary source: 11.25 ft; perceived wavelength: 9.25 ft
11. standing waves
12. hoot of the owl
13. frequency
14. The speed of sound increases as the density of water increases.
15. B and D
16. The speed of light in a vacuum is 3⋅10^8 m/s
17. two filters perpendicular to each other
18. Violet light has the most energy because it has the highest frequency.
19. From front to back
20. The wavelength of the wave increases.
21. The frequency remains constant.

don't want ya'll to get flagged for plagiarism so u gon have to use brainy or sum for last questions.

## 1. The Period of the wave is 0.2 seconds.

2. The wavelengths of Wave A and Wave B are related as λA = 3λB.

3. The wavelength of Wave B is 1.6 m.

4. The wavelength of the low sound is 17 m.

5. Wavelength of the stationary source: 9.25 ft; perceived wavelength: 11.25 ft.

6. Standing Waves are the waves that move in both directions along the string, interfering with each other, making nodes and antinodes.

7. The hoot of the owl can be heard over a greater distance in a forest.

8. The number of wavelengths that pass a point each second is called frequency.

9. The statement that can be inferred about the speed of sound in freshwater and in seawater is that Both temperature and salinity decrease the speed of sound in water.

10. The properties that apply to light are B and D.

## Which phrase correctly defines the amplitude of a wave?(1 point)

Responses

the horizontal distance from the crest of one wave to the crest of the next wave
the horizontal distance from the crest of one wave to the crest of the next wave

the horizontal distance from the trough of one wave to the trough of the next wave
the horizontal distance from the trough of one wave to the trough of the next wave

the vertical distance from the crest or trough of a wave to the equilibrium
the vertical distance from the crest or trough of a wave to the equilibrium

the vertical distance from the trough of a wave to the crest
the vertical distance from the trough of a wave to the crest

As waves move through water, the water at any point rises and falls. At a given moment, two points along the wave’s line of travel that are 2 meters apart have each risen to form adjacent crests. Which measure is described by this observation?(1 point)
Responses

amplitude
amplitude

speed
speed

frequency
frequency

wavelength
wavelength

A sound wave passes through regions of the ocean with varying density. How do the varying wavelengths correspond to the density of the water? Select the two correct answers.(1 point)
Responses

Longer wavelengths correspond to greater density of the water.
Longer wavelengths correspond to greater density of the water.

Shorter wavelengths correspond to lesser density of the water.
Shorter wavelengths correspond to lesser density of the water.

Shorter wavelengths correspond to greater density of the water.
Shorter wavelengths correspond to greater density of the water.

Longer wavelengths correspond to lesser density of the water.

## - The vertical distance from the crest or trough of a wave to the equilibrium correctly defines the amplitude of a wave.

- The wavelength measure is described by this observation: 2 meters is the wavelength in this case.
- Shorter wavelengths correspond to greater density of the water and longer wavelengths correspond to lesser density of the water.

## The speed of a wave is 2ms

, and its wavelength 0.4 meters. What is the period of the wave?(1 point)
Responses

2 seconds
2 seconds

0.8 seconds
0.8 seconds

5 seconds
5 seconds

0.2 seconds

Two similar waves are traveling through the same medium. Wave A has a frequency that is 3 times that of wave B.

How do their wavelengths compare?

(1 point)
Responses

λA=λB
lambda sub cap A is equal to lambda sub cap b

λA=3λB
lambda sub cap A is equal to 3 lambda sub cap b

λA=13λB

lambda sub cap A is equal to 1 third lambda sub cap b

λA=19λB

In a given period of time, 12,000 peaks of wave A and 15,000 peaks of wave B pass through the same medium under the same conditions. The wavelength of wave A is 2 m. What is the wavelength of wave B?(1 point)
Responses

2.5 m
2.5 m

0.4 m
0.4 m

2.0 m
2.0 m

1.6 m

The lowest frequency that we can hear is about 20 hertz. If the speed of sound in air is 340 meters/second, what is the wavelength of that low sound?(1 point)
Responses

17 m
17 m

170 m
170 m

6,800 m
6,800 m

0.059 m
0.059 m

A stationary source produces a sound wave at a frequency of 100 Hz. The wave travels at 1125 feet per second. A car is moving toward the sound source at a speed of 200 feet per second.

What is the wavelength of the stationary sound source and the wavelength that a person in the car perceives?

(1 point)
Responses

wavelength of the stationary source: 9.25 ft; perceived wavelength: 11.25 ft
wavelength of the stationary source: 9.25 ft; perceived wavelength: 11.25 ft

wavelength of the stationary source: 13.25 ft; perceived wavelength: 11.25 ft
wavelength of the stationary source: 13.25 ft; perceived wavelength: 11.25 ft

wavelength of the stationary source: 11.25 ft; perceived wavelength: 13.25 ft
wavelength of the stationary source: 11.25 ft; perceived wavelength: 13.25 ft

wavelength of the stationary source: 11.25 ft; perceived wavelength: 9.25 ft
wavelength of the stationary source: 11.25 ft; perceived wavelength: 9.25 ft

When the string on a violin vibrates, waves move in both directions along the string, interfering with each other. Sometimes these waves interact to make nodes and antinodes. What are these kinds of waves called?(1 point)
Responses

superposition waves
superposition waves

electromagnetic waves
electromagnetic waves

standing waves
standing waves

frequency waves

Owls communicate using long-wavelength hoots, while songbirds use short-wavelength tweets. Which of the sounds can be heard over a greater distance in a forest?(1 point)
Responses

Both the hoot and tweet will travel the same distance through the forest.
Both the hoot and tweet will travel the same distance through the forest.

hoot of the owl
hoot of the owl

Neither the hoot nor the tweet will be able to penetrate the forest.
Neither the hoot nor the tweet will be able to penetrate the forest.

tweet of the songbird
tweet of the songbird

The number of wavelengths that pass a point each second is called __________.(1 point)
Responses

amplitude
amplitude

wavelength
wavelength

medium
medium

frequency
frequency

The table below shows the speed of sound in water at different temperatures and salinities.

Speed of Sound in Water at Different Temperatures and Salinities
Temperature (°C) 0 10 20 30
Speed of sound in freshwater (ms

) 1,403 1,447 1,481 1,507
Speed of sound in seawater (ms

) 1,449 1,490 1,522 1,546
Which statement can be inferred about the speed of sound in freshwater and in seawater?

(1 point)
Responses

At 80°C, the speed of sound in freshwater and seawater will be the same.
At 80°C, the speed of sound in freshwater and seawater will be the same.

Both temperature and salinity decrease the speed of sound in water.
Both temperature and salinity decrease the speed of sound in water.

The speed of sound increases as the density of water increases.
The speed of sound increases as the density of water increases.

The speed of sound increases as the salinity of water decreases.

Consider the following list of properties. Which applies to light?
A: Mechanical wave
B: Electromagnetic wave
C: Travels in circular paths
D: Travels in a straight line(1 point)
Responses

A, B, and D
A, B, and D

A and C
A and C

A, B, and C
A, B, and C

B and D

## Which of the following statements about light is true?(1 point)

Responses

The speed of light in a vacuum is 3⋅108 m/s.
The speed of light in a vacuum is , 3 times 10 superscript 8 baseline m per s, .

The speed of light in a vacuum depends on the frequency of the light.
The speed of light in a vacuum depends on the frequency of the light.

The speed of light in a vacuum depends on the wavelength of the light.
The speed of light in a vacuum depends on the wavelength of the light.

Light cannot travel through a vacuum.

How many polarized filters are needed minimally to block light intensity?(1 point)
Responses

two filters perpendicular to each other
two filters perpendicular to each other

three filters perpendicular to each other
three filters perpendicular to each other

two filters parallel to each other
two filters parallel to each other

one filter

Which color of light has the most energy and why?(1 point)
Responses

Red light has the most energy because it has the shortest wavelength.
Red light has the most energy because it has the shortest wavelength.

Red light has the most energy because it has the highest frequency.
Red light has the most energy because it has the highest frequency.

Violet light has the most energy because it has the longest wavelength.
Violet light has the most energy because it has the longest wavelength.

Violet light has the most energy because it has the highest frequency.

In what way is an image formed by a mirror inverted?(1 point)
Responses

By refraction
By refraction

From left to right
From left to right

From top to bottom
From top to bottom

From front to back
From front to back

The table shows the speed of ultrasound waves in different tissues in the human body.

Tissue
Speed

(m/s)

Air 330
Fat 1,450
Water 1,480
Liver 1,550
Kidney 1,560
Blood 1,570
Muscle 1,580
Bone 4,080
What happens to an ultrasound wave that moves from muscle to bone?

(1 point)
Responses

The frequency of the wave increases.
The frequency of the wave increases.

The wavelength of the wave decreases.
The wavelength of the wave decreases.

The wavelength of the wave increases.
The wavelength of the wave increases.

The frequency of the wave decreases.

If a wave transfers from one medium to another medium with different properties, which statement is true?(1 point)
Responses

The frequency changes, while the wavelength and the speed of the wave remain the same.
The frequency changes, while the wavelength and the speed of the wave remain the same.

The period and the speed of the wave change proportionally.
The period and the speed of the wave change proportionally.

The frequency remains constant.
The frequency remains constant.

The period changes, while the wavelength and the speed of the wave remain the same.

You are fishing in a boat anchored in a bay. You notice that the current is in the eastern direction with small wave crests that are 15 meters apart, and they are gently rocking the boat once every 5 seconds. You decide to lift the anchor and begin trolling slowly to the west at 2.0 meters/second. In 1–2 sentences, explain the strategy for calculating how often the wave crests will rock the boat in this situation based on your investigation.

Suppose you were stranded on a desert island with only a convex lens and a mirror. Describe how you could use each of these tools to signal for help. (2 points)

## 1. The statement that is true about light is that the speed of light in a vacuum is 3⋅108 m/s.

2. Two filters perpendicular to each other are needed minimally to block light intensity.

3. Violet light has the most energy because it has the highest frequency.

4. An image formed by a mirror is inverted from front to back.

5. When an ultrasound wave moves from muscle to bone, the wavelength of the wave decreases.

6. If a wave transfers from one medium to another medium with different properties, the frequency changes while the wavelength and the speed of the wave remain the same.

7. To calculate how often the wave crests will rock the boat after lifting the anchor, we take the frequency of the waves (1/15) and add the frequency of the boat rocking (1/5) to it. Then, we take the reciprocal of the sum to get the time period between the wave crests rocking the boat.

8. A convex lens can be used to focus the sun's rays onto kindling to start a fire or to signal an airplane, while a mirror can be used to reflect sunlight towards a distant observer or rescuer.