Consider a sphere of radius R exposed to radiation of intensity I as shown in figure. If surface of sphere is partially reflecting with reflection coefficient is 0.3, then radiation force experienced is
A
πR2Ic
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B
1.7πR2Ic
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C
0.3πR2Ic
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D
1.3πR2Ic
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Solution
The correct option is D1.3πR2Ic Given, reflection coefficient, α=0.3
The total radiation force acting on the sphere is,