Light with an energy flux of 20 W/cm² falls on a non-reflecting surface at normal incidence. If the surface has an area of 30 cm², the total momentum delivered (for complete absorption) during 30 minutes is
A
36 × 10⁻⁵ kg m/s
B
36 × 10⁻⁴ kg m/s
C
108 × 10⁴ kg m/s
D
1.08 × 10⁷ kg m/s

Question

Light with an energy flux of 20 W/cm² falls on a non-reflecting surface at normal incidence. If the surface has an area of 30 cm², the total momentum delivered (for complete absorption) during 30 minutes is

A

36 × 10⁻⁵ kg m/s

B

36 × 10⁻⁴ kg m/s

C

108 × 10⁴ kg m/s

D

1.08 × 10⁷ kg m/s

Accepted Answer

36 × 10⁻⁴ kg m/s

Answer

36 × 10⁻⁵ kg m/s

Answer

108 × 10⁴ kg m/s

Answer

1.08 × 10⁷ kg m/s

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