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Find the wavelength at which a black body radiates maximum energy, if its remperature is
(Wein’s constant b = 2.898x 10-3 mK)
(A) `0.0414 xx 10^-6`
(B) `4.14xx10^-6 m`
(C) `41.4 xx10^-6m`
(D) `414 xx10^-6m`
Let 'p' and 'E' denote the linear momentum and energy of emitted photon respectively. If the wavelength of incident radiation is increased ___ .
(a) both p and E increase
(b) p increases and E decreases
(c) p decreases and E increases
(d) both p and E decrease.
When electron in hydrogen atom jumps from second orbit to first orbit, the wavelength of radiation emitted is λ. When electron jumps from third orbit to first orbit, the wavelength of emitted radiation would be _______.
The wavelength range of thermal radiation is
(A) from 4000 Å to 7000 Å
(B) from 7700 Å to 4 x 106 Å
(C) from 106 Å to 108 Å
(D) from 4 x 10-12 Å to 4 x 108 Å