A $5$ watt source emits monochromatic light of wavelength $5000\; \mathring A$. When placed $0.5\; m$ away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of $1.0\;m$, the number of photo electrons liberated will
A $5$ watt source emits monochromatic light of wavelength $5000\; \mathring A$. When placed $0.5\; m$ away, it liberates photoelectrons from a photosensitive metallic surface. When the source is moved to a distance of $1.0\;m$, the number of photo electrons liberated will
- [AIPMT 2007]
- A
be reduced by a factor of $4$
- B
be reduced by a factor of $2$
- C
be reduced by a factor of $8$
- D
be reduced by a factor of $16$
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- [AIPMT 2010]
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- [KVPY 2014]
$10^{-3} \, W$ of $5000\, \mathring A $ light is directed on a photoelectric cell. If the current in the cell is $0.16 \mu A$, the percentage of incident photons which produce photoelectrons, is.......$\%$
Write characteristic of photon or How photon of electromagnetic radiation can be represented ?
Write characteristic of photon or How photon of electromagnetic radiation can be represented ?