Question:
Which radiations will be most effective for the emission of electrons from a metallic surface?
Which radiations will be most effective for the emission of electrons from a metallic surface?
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Ultraviolet radiation has higher frequency and energy compared to visible light, making it most effective for the emission of electrons in the photoelectric effect.
Updated On: Apr 10, 2025
- Microwaves
- X-rays
- Ultraviolet
- Infrared
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The Correct Option is C
Solution and Explanation
Step 1: Understand the photoelectric effect.
The photoelectric effect occurs when light of a sufficiently high frequency strikes a metal surface and ejects electrons.
The frequency of the light must be above a certain threshold frequency to overcome the work function of the metal.
Step 2: Identify the most effective radiation.
Ultraviolet radiation has higher energy than visible light, and its frequency is above the threshold for most metals, making it the most effective for the emission of electrons.
The photoelectric effect occurs when light of a sufficiently high frequency strikes a metal surface and ejects electrons.
The frequency of the light must be above a certain threshold frequency to overcome the work function of the metal.
Step 2: Identify the most effective radiation.
Ultraviolet radiation has higher energy than visible light, and its frequency is above the threshold for most metals, making it the most effective for the emission of electrons.
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