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An electromagnetic wave of intensity 150 W/m2 is incident normally on a rectangular card with sides of 18 cm and 36 cm that reflects all

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An electromagnetic wave of intensity 150 W/m2 is incident normally on a rectangular card with sides of 18 cm and 36 cm that reflects all the radiation incident on it. Find the force exerted by the electromagnetic wave on the card if the radiation is incident at an angle of 30 to the normal 54 XnN

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