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11. Dual nature of radiation and matter — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics11. Dual nature of radiation and matter1 Mark
MCQ
Which of the following statement is not correct
  • 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
  • ✓
    Infrared photons have more energy than photons of visible light
✓

Answer

Correct option: D.
Infrared photons have more energy than photons of visible light
d
(d) $E \propto \frac{1}{\lambda };$ also ${\lambda _{{\rm{infrared}}}} > {\lambda _{{\rm{visible}}}}$ so ${E_{{\rm{infrared}}}} < {E_{{\rm{visible}}}}$

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