List of top Physics Questions on radiation asked in KEAM

Energy of radiation incident on a perfect absorbing surface per unit are in unit time is 3.6J. The radiation pressure is:

The force experienced by the Earth due to solar radiation is $9 \times 10^9$, N. Find the radiation pressure on Earth. (Radius of Earth R = $6.4 \times 10^6$, m)

If a black body at a temperature T radiates the maximum energy at a wavelength \(\lambda_{m}\), then to radiate the maximum energy at the wavelength \(\frac{\lambda_{m}}{3}\), its temperature should be

The radiation produced by a 100 W bulb has the following property

Two perfectly black spheres A and B having radii 8 cm and 2 cm are maintained at temperatures \(127^\circ C\) and \(527^\circ C\) respectively. The ratio of the energy radiated by A to that by B is