radiation is an important topic in the Physics section in MHT CET exam. Practising this topic will increase your score overall and make your conceptual grip on MHT CET exam stronger.
This article gives you a full set of MHT CET PYQs for radiation with explanations for effective preparation. Practice of MHT CET Physics PYQs including radiation questions regularly will improve accuracy, speed, and confidence in the MHT CET 2026 exam.
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MHT CET PYQs for radiation with Solutions
1.
Two photons of same frequency are produced due to the annhiliation of a proton and antiproton. Wave length of the proton so produced is:- (A)
- (B)
- (C)
- (D)
2.
Two black bodies emit the same amount of radiation per second. The radius of the first is \( R_1 = 2 \, \text{m} \) and its temperature is \( T_1 = 400 \, \text{K} \). If the second body has a radius \( R_2 = 4 \, \text{m} \), what is its temperature \( T_2 \) in Kelvin?- \( 200 \, \text{K} \)
- \( 300 \, \text{K} \)
- \( 250 \, \text{K} \)
- \( 400 \, \text{K} \)
3.
A star 'A' has radiant power equal to 3 times that of the Sun. The temperature of star 'A' is \( 6000 \, \mathrm{K} \) and that of the Sun is \( 2000 \, \mathrm{K} \). What is the ratio of their radii?- \( 900:1 \)
- \( 81:1 \)
- \( 729:1 \)
- \( 27:1 \)
4.
A radioactive substance has a half-life of 5 years. What is the probability that a single atom of this substance will decay within 5 years?- \( \frac{1}{2} \)
- \( \frac{1}{4} \)
- \( \frac{3}{4} \)
- \( \frac{1}{8} \)
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