Question Detail

PHY 104 Photo Electric Emission Objective Question
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Question

Why is the Photoelectric Effect considered strong evidence for the particle nature of light?
Options
A Because it demonstrates diffraction and interference.
B Because electrons are emitted immediately, regardless of intensity, when frequency is above threshold.
Correct Answer
C Because the intensity of light affects the number of emitted electrons.
D Because light can travel through a vacuum.
Correct Answer

Option B is the correct answer.

Detailed Explanation

The immediate emission (no delay) and the existence of a threshold frequency, which classical wave theory could not explain, strongly support the idea of light acting as discrete energy packets (photons) that either provide enough energy or not.

Hint

Think about the observations that classical wave theory failed to explain.

Question Info

Course: PHY 104
Topic: Photo Electric Emission
Type: Objective
Difficulty: Not specified
Question 188 of 947
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