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Calorific Value and Efficiency of a Fuel

if surface re...

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if surface reflects completely the radiation falling on it then radiation pressure is given by with complee explanation

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Q. If radiation are incident obliquely on a perfectly reflecting surface then the pressure exerted by radiation on the surface will be:

Q. If a photon of intensity

I

falls on a surface at an angle

60^{\circ}

making with it having absorption coefficient

0.4

, then radiation pressure exerted on the surface is-

Q. In which of the following cases, the force due to the incident radiation will be largest? Assume same intensity and surface area for all cases.

(1)

Radiation incident normally on a surface, getting absorbed completely.

(2)

Radiation incident normally on a surface, getting reflected completely and travelling in opposite direction with same speed.

(3)

Radiation incident obliquely on a surface, getting reflected completely and travelling with same speed, after reflection.

Q. Which of the following formula is correct for radiation pressure if light is obliquely incident on a partially reflecting surface?

A radiation of energy ‘E’ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is

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