1a. An electromagnetic wave (light) traveling through air enters a tank of water
ID: 1571688 • Letter: 1
Question
1a. An electromagnetic wave (light) traveling through air enters a tank of water. The frequency of this light:
Decreases as it goes from air to water
Makes a nest of mole rats very, very happy
Stays the same
Increases as it goes from air to water
b. Superposition of waves can occur:
In transverse waves.
In longitudinal waves.
In sinusoidal waves.
In all of the above.
In only transverse and sinusoidal waves.
PLEASE HELP WITH THESE TWO QUESTIONS. THANK YOU
Decreases as it goes from air to water
Makes a nest of mole rats very, very happy
Stays the same
Increases as it goes from air to water
b. Superposition of waves can occur:
In transverse waves.
In longitudinal waves.
In sinusoidal waves.
In all of the above.
In only transverse and sinusoidal waves.
Explanation / Answer
Frequency stays the same.
Explanation
When light moves from one medium to another, its energy does not change (the number of oscillations per second of the wave), but the change in medium results in a lengthening or shortening of the distance between wave crest (the wavelenght). The light moves slower or faster through the medium (C in Vacuum > C in Air > C in Water), but the energy is not changed, so the frequency stays the same (and so the light remains the same color)
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