JEE Mains · Physics · STD 12 - Dual nature of radiation and matter
- JEE Mains 2023
- Medium
- MCQ
Given below are two statements: Statement \(I:\) Out of microwaves, infrared rays and ultraviolet rays, ultraviolet rays are the most effective for the emission of electrons from a metallic surface. Statement \(II:\) Above the threshold frequency, the maximum kinetic energy of photoelectrons is inversely proportional to the frequency of the incident light. In the light of above statements, choose the correct answer from the options given below:
Pick an option to check your answer.
Answer & Solution
Correct Answer
(A) Statement \(I\) is true but Statement \(II\) is false
Step-by-step Solution
Detailed explanation
\(UV\) rays have maximum frequency hence are most effective for emission of electrons from a metallic surface.
\(KE _{\max .}= hf - hf _0\)
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