The mass of a photo electron is
$9.1 \times {10^{ - 27}}\,kg$
$9.1 \times {10^{ - 29}}\,kg$
$9.1 \times {10^{ - 31}}\,kg$
$9.1 \times {10^{ - 34}}\,kg$
(c)
Which of the following statement is not correct
The momentum of a photon in an $X-$ ray beam of ${10^{ – 10}}$ metre wavelength is
By suitable example show that particle or wave nature depend on type of experiment.
In a dark room of photography, generally red light is used. The reason is
An electron with (rest mass $m_{0}$ ) moves with a speed of $0.8 c$. Its mass when it moves with this speed is
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