RADIATION PART 1

Radiation Part 2

When Some Part Of Radiation Is Absorbed And Remaining Part Is Reflected

Assertion : Coefficient of absorption of radiation of an ideal black body is 1 . Reason : An ideal black body emits radiation of all wavelengths.

Assertion: Like light radiation, thermal radiations are also electromagnetic radiation. Reason: The thermal radiations require no medium for propagatio.

Assertion: Like light radiation, thermal radiations are also electromagnetic radiation. Reason: The thermal radiations require no medium for propagation.

Assertion (A) : The energy of ultraviolet radiation is greater than the energy of infrared radiation Reason (R) : The velocity of ultraviolet radiation is greater than the velocity of infrared radiation

Power radiated by a black body at temperature T_(1) is P and it radiates maximum energy at a wavelength lambda_(1) . If the temperature of the black body is changed from T_(1) to T_(2) , itradiates maximum energy at a wavelength lambda_(1)//2 .The power radiated at T_(2) is

Obtain the temperature ranges for ultraviolet part of radiation of EM waves. Take frequency of ultraviolet part of radiation as 8 xx10^(14)Hz to 5xx10^(17) Hz .