Energy in Waves Quick Check
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Question
X-ray technicians wear protective gear to keep them safe from the X-rays. Why are X-rays dangerous?(1 point)
Responses
They have short wavelengths that can penetrate materials, and their high energy can damage matter.
They have short wavelengths that can penetrate materials, and their high energy can damage matter.
They have long wavelengths that can penetrate materials, and their low energy can damage matter.
They have long wavelengths that can penetrate materials, and their low energy can damage matter.
They have short wavelengths that can penetrate materials, and their low energy can damage matter.
They have short wavelengths that can penetrate materials, and their low energy can damage matter.
They have long wavelengths that can penetrate materials, and their high energy can damage matter.
They have long wavelengths that can penetrate materials, and their high energy can damage matter.
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Correct answer: They have short wavelengths that can penetrate materials, and their high energy can damage matter.
the number of waves that pass a certain point within a certain time
wave 4
Lightning has more energy than the radio because gamma rays have a shorter wavelength.
Frequency is measured in hertz. Which option best describes hertz?(1 point)
Responses
the number of waves that pass a certain point within a certain time
the number of waves that pass a certain point within a certain time
the distance that one cycle of a wave will travel
the distance that one cycle of a wave will travel
the number of vibrations produced per minute
the number of vibrations produced per minute
the length of a wave over a specified length of time
Use the information about four different waves to answer the question.
Wave # Frequency Wavelength
Wave 1 6.66 × 1014 Hz 450 nm
Wave 2 5.77 × 1014 Hz 520 nm
Wave 3 4.61 × 1014 Hz 650 nm
Wave 4 4.28 × 1014 Hz 700 nm
Which wave contains the lowest energy?
(1 point)
Responses
wave 4
wave 4
wave 2
wave 2
wave 1
wave 1
wave 3
Use the image of the electromagnetic spectrum to answer the question.
The illustration describes the different wavelengths in decreasing order and the frequency in increasing order from left to right. The radiations shown are as follows: the radio waves (AM, FM, TV, and radar), wavelength from 100 m to 1 cm. Infrared (TV remote), wavelength from 1 cm to 1000 nm. Visible spectrum (light bulb) wavelength from 1000 nm to 10 nm. X-rays (X-ray machine) wavelength from 10 nm to 0.01 nm. Gamma rays (radioactive elements) wavelength from 0.01 nm to 0.0001 nm.
Lightning contains gamma rays. Based on the position of gamma rays in the electromagnetic spectrum, does lightning have more or less energy than a radio?
(1 point)
Responses
Lightning has more energy than the radio because gamma rays have a shorter wavelength.
Lightning has more energy than the radio because gamma rays have a shorter wavelength.
Lightning has less energy than the radio because gamma rays have a longer wavelength.
Lightning has less energy than the radio because gamma rays have a longer wavelength.
Lightning has more energy than the radio because gamma rays have a longer wavelength.
Lightning has more energy than the radio because gamma rays have a longer wavelength.
Lightning has less energy than the radio because gamma rays have a shorter wavelength.
Lightning has less energy than the radio because gamma rays have a shorter wavelength.
Waves have energy that causes particles in matter to vibrate. So, it stands to reason that(1 point)
Responses
the higher the energy, the slower the particles vibrate (which means a lower frequency).
the higher the energy, the slower the particles vibrate (which means a lower frequency).
the higher the energy, the faster the particles vibrate (which means a higher frequency).
the higher the energy, the faster the particles vibrate (which means a higher frequency).
the lower the energy, the faster the particles vibrate (which means a lower frequency).
the lower the energy, the faster the particles vibrate (which means a lower frequency).
the lower the energy, the slower the particles vibrate (which means a higher frequency).
The correct answer is: They have short wavelengths that can penetrate materials, and their high energy can damage matter.
Explanation: X-rays have short wavelengths, which allows them to penetrate materials. This ability to penetrate materials makes them useful in medical imaging, but it also makes them potentially dangerous. X-rays carry high energy, and this energy can be absorbed by the tissues in our bodies, causing damage to cells and DNA. To protect themselves from this potential harm, X-ray technicians wear protective gear such as lead aprons and thyroid shields. These protective materials help to block or absorb the X-rays, reducing the amount of exposure and protecting the technician from harm.