A 1.5 kW (kilo-watt) laser beam of wavelength 6400 Å is used to levitate a thin aluminium disc of same area as the cross section of the beam. The laser light is reflected by the aluminium disc without any absorption. The mass of the foil is close toA. `10^(-9) kg`B. `10^(-3) kg`C. `10^(-4) kg`D. `10^(-6) kg`

A 1.5 kW (kilo-watt) laser beam of wavelength 6400 Å is used to levit

1.	A 1.5 kW (kilo-watt) laser beam of wavelength 6400 Å is used to levitate a thin aluminium disc of same area as the cross section of the beam. The laser light is reflected by the aluminium disc without any absorption. The mass of the foil is close toA. `10^(-9) kg`B. `10^(-3) kg`C. `10^(-4) kg`D. `10^(-6) kg`
Answer» Correct Answer - D

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