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
Two perfectly black bodies are at temperatures \( T \) and \( 2T \). The ratio between the wavelengths corresponding to maximum energy emission by the two black bodies is
The rate of emission of a perfectly black body at temperature \( 27^\circ C \) is \( E_1 \). If the temperature of the body is raised to \( 627^\circ C \), its rate of emission becomes \( E_2 \). The ratio of \( \frac{E_1}{E_2} \) is:
The radiation produced by a 100 W bulb has the following property
If the emission rate of blackbody at $0^\circ\text{C}$ is $R$ then, the rate of emission at $273^\circ\text{C}$ is
For any material, if R, T and A represent the reflection coefficient, transparent coefficient and absorption coefficient respectively, then, for a blackbody which one of the following is true ?
the emission rate of blackbody at $0^{\circ}C$ is R then, the rate of emission at $273^{\circ}C$ is
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
The temperature of a radiating body increases by $30\%$. Then the increase in the amount of radiation is