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Among the substances listed, in which one does a beam of light travel at the highest speed?

(1 point)
Responses

Glass
Glass

Plastic
Plastic

Air
Air

Water

Melissa is studying the distinct characteristics of waves and has discovered that when the wavelength of a wave increases, the frequency decreases. In what circumstance does the speed of a wave alter?

(1 point)
Responses

when the wave comes into contact with a different medium
when the wave comes into contact with a different medium

when a wave bounces off a surface
when a wave bounces off a surface

when there is a change in the amplitude of the wave
when there is a change in the amplitude of the wave

when there is a change in the mass of the wave

the data displays the velocity of sound in air, sea water, and steel at a temperature of 21°C.
material speed (M/S)
air 331
sea water 1,524
steel 5,180
How does the velocity of sound in sea water compare to that in air?

(1 point)
Responses

The velocity of sound is reduced in sea water because the molecules in sea water are more closely packed and less dense.
The velocity of sound is reduced in sea water because the molecules in sea water are more closely packed and less dense.

The velocity of sound is reduced in sea water because the molecules in sea water are more closely arranged and denser.
The velocity of sound is reduced in sea water because the molecules in sea water are more closely arranged and denser.

The velocity of sound is greater in sea water because the molecules in sea water are more closely packed and denser.
The velocity of sound is greater in sea water because the molecules in sea water are more closely packed and denser.

The velocity of sound is greater in sea water due to the closer proximity and lower density of molecules in sea water.

A student generates a transverse wave using a rope secured to a tree, as depicted in the illustration.

Her teacher instructs her to modify the wave to exhibit a higher energy transfer. What options does the student have?

(1 point)
Responses

She has the choice to reduce the amplitude of the wave.
She has the choice to reduce the amplitude of the wave.

She has the option to lower the frequency of the wave.
She has the option to lower the frequency of the wave.

She can extend the wavelength of the wave.
She can extend the wavelength of the wave.

She has the option to increase the frequency of the wave.

he illustration depicts a transverse wave.

Josie sketches an additional diagram illustrating the impact of adding energy to this wave. How does her latest diagram differ from this one?

(1 point)
Responses

In her diagram, reduced wave amplitudes are illustrated.
In her diagram, reduced wave amplitudes are illustrated.

In her diagram, longer wavelengths are depicted.
In her diagram, longer wavelengths are depicted.

In her diagram, diminished wave frequencies are depicted.
In her diagram, diminished wave frequencies are depicted.

In her diagram, elevated wave amplitudes are illustrated.
In her diagram, elevated wave amplitudes are illustrated.

Leo constructs a model featuring two waves with identical amplitudes, as depicted.

Which description MOST effectively contrasts the two waves?

(1 point)
Responses

Wave B possesses lower energy because it has a lower frequency and a longer wavelength.
Wave B possesses lower energy because it has a lower frequency and a longer wavelength.

Wave A possesses higher energy due to its lower frequency and longer wavelength.
Wave A possesses higher energy due to its lower frequency and longer wavelength.

Wave A has a lower energy level because it has a higher frequency and a shorter wavelength.
Wave A has a lower energy level because it has a higher frequency and a shorter wavelength.

Wave B possesses higher energy because it has a higher frequency and a shorter wavelength.

A student is constructing a lens model that maximizes the dispersion of light over the largest area. What type of model should the student create?

(1 point)
Responses

The student should craft a concave lens model as it redirects light away from the center of the lens.
The student should craft a concave lens model as it redirects light away from the center of the lens.

The student should construct a concave lens model as it disperses light into bands of color.
The student should construct a concave lens model as it disperses light into bands of color.

The student should craft a convex lens model as it disperses light into bands of color.
The student should craft a convex lens model as it disperses light into bands of color.

The student should create a convex lens model as it redirects light away from the center of the lens.

Aila is constructing a model of a biconvex lens. She illustrates horizontal lines to represent light rays moving towards the lens.

How should Aila depict the light rays after they pass through the lens?

(1 point)
Responses

Aila should depict them continuing in the same direction.
Aila should depict them continuing in the same direction.

Aila should illustrate them diffracting and moving in an upward direction.
Aila should illustrate them diffracting and moving in an upward direction.

Aila should depict them diverging without intersecting.
Aila should depict them diverging without intersecting.

Aila should illustrate them converging toward a focal point.
Aila should illustrate them converging toward a focal point.
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1 answer

Here are the answers to each question based on the information given:

  1. In which substance does a beam of light travel at the highest speed?

    • Answer: Air

  2. In what circumstance does the speed of a wave alter?

    • Answer: When the wave comes into contact with a different medium

  3. How does the velocity of sound in sea water compare to that in air?

    • Answer: The velocity of sound is greater in sea water because the molecules in sea water are more closely packed and denser.

  4. What options does the student have to increase energy transfer in the wave?

    • Answer: She has the option to increase the frequency of the wave.

  5. How does Josie's diagram differ when adding energy to the wave?

    • Answer: In her diagram, elevated wave amplitudes are illustrated.

  6. Which description MOST effectively contrasts the two waves?

    • Answer: Wave B possesses lower energy because it has a lower frequency and a longer wavelength.

  7. What type of model should the student create to maximize the dispersion of light?

    • Answer: The student should construct a concave lens model as it disperses light into bands of color.

  8. How should Aila depict the light rays after they pass through the biconvex lens?

    • Answer: Aila should illustrate them converging toward a focal point.

Feel free to ask if you have any further questions!