Question Detail

PHY 104 Reflection and Refraction of Light Objective Question
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Question

Why does white light separate into a spectrum of colors when passing through a prism, a phenomenon known as dispersion?
Options
A Different colors of light have different frequencies, and only red light can pass through a prism.
B The index of refraction of the prism material varies slightly with wavelength, causing different colors to bend at varying degrees.
Correct Answer
C Prisms absorb all colors except those in the visible spectrum.
D The prism's rough surface causes diffuse reflection for different wavelengths.
Correct Answer

Option B is the correct answer.

Detailed Explanation

Page 44 explains, 'The index of refraction of many transparent materials, such as glass and water, varies slightly with wavelength. This is how prisms and water droplets create rainbows from sunlight.' It further clarifies, 'Since the index of refraction is greater for the shorter wavelengths, violet light is bent the most and red the least.'

Hint

Consider how different colors (wavelengths) interact with the medium's properties.

Question Info

Course: PHY 104
Topic: Reflection and Refraction of Light
Type: Objective
Difficulty: Not specified
Question 29 of 947
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