TS EAMCET · Physics · Atomic Physics
A light bulb of power is placed at the centre of a hollow sphere of radius If the of the energy is converted into light, then the pressure exerted by the light on the surface of the sphere will be
(Assume the surface of sphere to be perfectly absorbing)
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Intensity of bulb at r=10 cm, we have I=P4πr2 Intensity of bulb, that is converted to light is, I'=0.66I ⇒I'=0.66×P4πr2 Radiation pressure in this case is given by, Pr=I'c, as light is absorbed at the surface of sphere. ⇒Pr=0.66c×P4πr2…
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