NEET-XII-Physics
11: Dual Nature Of Radiation And Matter
- #4-aFind the energy and momentum of each photon in the light beam,
(b) How many photons per second, on the average, arrive at a target irradiated by this beam? (Assume the beam to have uniform cross-section which is less than the target area), and
(c) How fast does a hydrogen atom have to travel in order to have the same momentum as that of the photon?Ans : The energy of each photon is given as:
The momentum of each photon is given as:
(b) Number of photons arriving per second, at a target irradiated by the beam = n
Assume that the beam has a uniform cross-section that is less than the target area.
Hence, the equation for power can be written as:
(c) Momentum of the hydrogen atom is the same as the momentum of the photon,
Momentum is given as:
Where,
v = Speed of the hydrogen atom
- #4-bHow many photons per second, on the average, arrive at a target irradiated by this beam? (Assume the beam to have uniform cross-section which is less than the target area), andAns : Number of photons arriving per second, at a target irradiated by the beam = n
Assume that the beam has a uniform cross-section that is less than the target area.
Hence, the equation for power can be written as:
- #4-cHow fast does a hydrogen atom have to travel in order to have the same momentum as that of the photon?Ans : Momentum of the hydrogen atom is the same as the momentum of the photon,
Momentum is given as:
Where,
v = Speed of the hydrogen atom