7 Electromagnetic wave of intensity 1800 W m falls on a completely absorbing spherical surface...
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7 Electromagnetic wave of intensity 1800 W m falls on a completely absorbing spherical surface having radius R as shown in the figure R 3 cm Force exerted by beam on the sphere is 1 108 10 10 N 2 54 x 10 10 N 3 216 10 10 N 4 Zero
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