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QAIPMT-2007-Ph-2370: NEET 2007 Physics - Class 11 AIPMT-2007-Ph-2370 Solution: A 5 watt source emits monochromatic light of wavelength 5000 \( …
A 5 watt source emits monochromatic light of wavelength 5000 . 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 photoelectrons liberated will be reduced by a factor of 8 16 2 4
Multiple Choice Options
- A g _ /V
- B g/V
- C V/g
- D V/(g _ ).
Step-by-Step Verified Solution
Given u = V, final velocity = 0.
Using v = u + at
_ 0 = V _ a t
_ _ a = 0 _ V t = _ V t
f = _ R = _ mg (f is the force of friction)
_ Retardation, a = _ g
So, t = V a = V _ g