A 100 W light bulb is placed at the centre of a spherical chamber of radius 20cm. Assume that 60% of the energy supplied to the bulb is converted into light and that the surface of the chamber is perfectly absorbing. Find the pressure exerted by the light on the surface of the chamber.

A 100W light bulb giving monochromatic light of wavelength 6000A^(@) is placed at the centre of a spherical chamber of radius 0.20m. Assume that 50% of the energy supplied to the bulb is converted into light and that the surface of the chamber is perfectly absorbing. Find (i) the energy and momentum of each photon in the light beam. (ii) How many photons per second, on the average arrive at the surface of spherical chamber, and (iii) The pressure exerted by the light on the surface of the chamber. Given, h=6.6xx10^(-34)Js .

Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 60% of the consumed energy is converted into light. Wavelength of sodium light = 590 nm.

Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 60% of the consumed energy is converted into light. Wavelengths of sodium light =590nm.

Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 60% of the consumed energy is converted into light. Wavelengths of sodium light =590nm.

Calculate the number of photons emitted per second by a 10 W sodium vapour lamp. Assume that 60% of the consumed energy is converted into light. Wavelengths of sodium light =590nm.

Determine the light pressure exerted on the walls of an electric bulb of power 100 W . The bulb is made in the form of a sphere of radius 5cm , its walls reflect 10 % of the incident light and the rest 90% of the light is transmitted. Assume that the entire power consumed by the bulb is converted into radiation and transmitted light does not exert any pressure.

If 5% of the energy supplied to a bulb is irradiated as visible light, how many quanta are emitted per second by a 100 W lamp? Assume wavelength of visible light as 5.6xx10^(-5) cm.