Light of wavelength λ strikes a photo-sensitive surface and electrons are ejected with…
Physics · JEE Advanced · NTA Exams — Atoms and Nuclei
Light of wavelength λ strikes a photo-sensitive surface and electrons are ejected with kinetic energy E. If the kinetic energy is to be increased to 2E, the wavelength must be changed to \(\lambda^{\prime}\) where
- \(\lambda^{\prime}=\frac{\lambda}{2}\)
- λ’ = 2λ
- \(\frac{\lambda}{2}<\lambda^{\prime}<\lambda\)
- λ’ > λ
Answer
(C) 2 < ^ <
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