Light of frequency 1 x 10^15 Hz has a wavelength of 200 nm in a certain medium.

Question

Light of frequency 1 x 10^15 Hz has a wavelength of 200 nm in a certain medium. What is the index of refraction of that medium?
Choose one answer.
a. 1.0
b. 1.3
c. 1.5
d. 1.8
e. 2.0

Also, can you also do this one?

When light passes from air into glass, which of the following combinations is true?
Choose one answer.
a. frequency stays the same, wavelength stays the same, wave speed decreases
b. frequency stays the same, wavelength increases, wave speed increases
c. frequency stays the same, wavelength decreases, wave speed decreases
d. frequency decreases, wavelength decreases, wave speed stays the same
e. frequency increases, wavelength increases, wave speed stays the same

Explanation / Answer

c 1.5 c. frequency stays the same, wavelength decreases, wave speed decreases

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