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(chatquestion)...260 • Opties and Modern Physics
INTRODUCTORY EXERCISE 33.1
Find the energy and momentum of a photon of ultraviolet radiation of 280 nm wavelength.
2. A small plate of a metal is placed at a distance of 2 m from a monochromatic light source of
wavelength 4.8 x 10 m and power 1.0 Watt. The light falls normally on the plate. Find the
number of photons striking the metal plate per square metre per second.
3 A proton and a deuteron are accelerated by same potential difference. Find the ratio of their
de-Bfoglie wavelengths.
urticles pas
sufered de
To accour
acarly all
electrons
4. A deuteron and an a-particle have same kinetic energy. Find the ratio of their de-Broglie
alectros
wavelengths.
5. Two protons are having same kinetic energy. One proton enters a uniform magnetic field at right
angles to it. Second proton enters a uniform electric field in the direction of field. After some time
their de-Broglie wavelengths are 1, and A2, then
(a) ^1 = 12
(d) some more information is required
motion
The la
strons
Ruth
(b) ^, < ^2
evi
(c) > 12
ele
aG
...
