Which of these best describes the type of lens shown in the ray diagram?
Responses
It shows a concave lens. For this type of lens, the image is always on the opposite side of the lens as the original object.
It shows a concave lens. For this type of lens, the image is always on the opposite side of the lens as the original object. - no response given
It shows a convex lens. For this type of lens, the image is always on the opposite side of the lens as the original object.
It shows a convex lens. For this type of lens, the image is always on the opposite side of the lens as the original object. - incorrect
It shows a concave lens. For this type of lens, the image position depends on the object's position relative to the focus point.
It shows a concave lens. For this type of lens, the image position depends on the object's position relative to the focus point. - no response given
It shows a convex lens. For this type of lens, the image position depends on the object's position relative to the focus point.
It shows a convex lens. For this type of lens, the image position depends on the object's position relative to the focus point. - not selected, this is the correct answer
The ray diagram only shows a specific case for the given type of lens.
explain why this answer is correct
This answer is correct because the behavior of the image formed by a concave or convex lens is dependent on the object's position relative to the lens and its focal points. The image produced by a convex lens can be either real or virtual, depending on the object's position. Similarly, the image formed by a concave lens can also vary in position based on the object's location. This variability in image formation based on the object's position is a key characteristic of both convex and concave lenses.
Which combination of frequencies would produce the lowest beat frequency?
Responses
500 Hz and 501 Hz
500 Hz and 501 Hz - not selected, this is the correct answer
500 Hz and 600 Hz
500 Hz and 600 Hz - no response given
10 Hz and 20 Hz
10 Hz and 20 Hz - no response given
10 Hz and 15 Hz
10 Hz and 15 Hz - incorrect
This would have a beat frequency of 1 Hz.
explain why this answer is correct
This answer is correct because the beat frequency is calculated as the absolute difference between the frequencies of the two waves. In this case, if we have frequencies of 500 Hz and 501 Hz, the difference between them is 1 Hz, which would result in the lowest beat frequency among the given combinations. The other options have greater differences in frequency, resulting in higher beat frequencies.
Which statement regarding sound traveling in air is correct?
Responses
A wave with a shorter wavelength is always faster than one with a longer wavelength.
A wave with a shorter wavelength is always faster than one with a longer wavelength. - no response given
The frequency of a sound does not affect the speed at which it travels.
The frequency of a sound does not affect the speed at which it travels. - not selected, this is the correct answer
A loud sound travels faster than a quiet sound.
A loud sound travels faster than a quiet sound. - no response given
As the wavelength increases, the frequency also increases.
As the wavelength increases, the frequency also increases. - incorrect
The wavelength is inversely proportional to the frequency of the sound such that an increase in wavelength means a decrease in frequency.
explain why this is the correct answer