Dual Nature Of Light Question 229
Question: Which of the following statement is not correct [AFMC 1999]
Options:
A) Photographic plates are sensitive to infrared rays
B) Photographic plates are sensitive to ultraviolet rays
C) Infra-red rays are invisible but can cast shadows like visible light
D) Infrared photons have more energy than photons of visible light
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Answer:
Correct Answer: D
Solution:
$ E\propto \frac{1}{\lambda }; $ also $ {\lambda_{infrared}}>{\lambda_{visible}} $ so $ {E_{infrared}}<{E_{visible}} $