Practicing Success
Practicing Success
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A plane electromagnetic wave of wave intensity 6 W/m2 strikes a small mirror of area 40 cm2, held perpendicular to the approaching wave. The radiation force on the mirror will be: |
6.4 × 10-7 N 4.8 × 10-8 N 3.2 × 10-9 N 1.6 × 10-10 N |
1.6 × 10-10 N |
∴ Momentum per sec is force ∴ F = 1.6 × 10-10 Newton |
