Radiation Pressure

A laser beam $(\mathrm{\lambda }=633 \mathrm{nm})$ has an average power of $3 \mathrm{mW}$. What will be the pressure exerted on a surface by this beam if the cross-sectional area is $3 {\mathrm{mm}}^2$? (Assume perfect reflection and normal incidence.)

An earth-orbiting satellite has a solar energy collecting panel with total area $5\mathrm{ }{\mathrm{m}}^2$. If solar radiations are perpendicular and completely absorbed, the average force associated with the radiation pressure is
(Solar constant$=1.4\mathrm{ }\mathrm{k}\mathrm{W} {\mathrm{m}}^{-2}$)

The incident intensity on a horizontal surface at sea level from sun is about $1 \mathrm{kW} {\mathrm{m}}^{-2}$. If $50\%$ of this intensity is reflected and $50\%$ is absorbed, then find the ratio of radiation pressure to atmospheric pressure $p_0=1\times {10}^5 \mathrm{Pa}$ at sea level

A perfectly absorbing surface intercepts a parallel beam of monochromatic light of power $10 \mathrm{W} \left(\lambda =500 \mathrm{n} \mathrm{m}\right)$ incident on it normally the force exerted by light beam on the surface is 

When two chemically non-reactive liquids are placed in a U-shaped tube as shown in the figure, then the heights of the liquid columns are,

A laser beam of pulse power ${10}^{12} \mathrm{W}$ is focused on an object of area ${10}^{-4}\mathrm{ }\mathrm{c}{\mathrm{m}}^2$. The energy flux in $\mathrm{W} \mathrm{c}{\mathrm{m}}^{-2}$ at the point of focus is

A $100 \mathrm{W}$ light bulb is placed at the centre of a spherical chamber of radius $0.10 \mathrm{m}$. Assume that $66\%$ of the energy supplied to the bulb is converted into light and that the surface of chamber is perfectly absorbing. The pressure exerted by the light on the surface of the chamber is

A parallel beam of light is incident normally on a plane surface absorbing $40\%$ of the light and reflecting the rest. If the incident beam carries $60 \mathrm{W}$ of power, the force exerted by it on the surface is

A radiation of $200 W$ is incident on a surface which is $60\%$ reflecting and $40\%$ absorbing. The total force on the surface is

A plane electromagnetic wave of intensity $10 \mathrm{W} {\mathrm{m}}^{-2}$ strikes a small mirror of area $20 \mathrm{c}{\mathrm{m}}^2$, held perpendicular to the approaching wave. The radiation force on the mirror will be

An earth orbiting satellite has solar energy collecting panel with total area $5\mathrm{ }{\mathrm{m}}^2$. If solar radiations are perpendicular and completely absorbed, the average force associated with the radiation pressure is
(Solar constant$=1.4\mathrm{ }\mathrm{k}\mathrm{W} {\mathrm{m}}^{-2}$)

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

An electromagnetic wave with pointing vector $5 \mathrm{W} {\mathrm{m}}^{-2}$ is absorbed by a surface of some area. If the force on the surface is ${10}^{-7}\mathit{ }\mathrm{N}$, then the area is

What is the radiation pressure exerted by an EM wave of intensity I on a surface kept in vacuum?

A perfectly reflecting solid hemisphere of radius R is placed in the path of a parallel beam of light of large aperture. If the beam carries an intensity I, find the force exerted by the beam on the hemisphere

Radiations of intensity $0.5 \mathrm{W} {\mathrm{m}}^{-2}$​ are striking a metal plate. The pressure on the plate is