Rank the following radiations according to their associated photon energies, greatest first : (a) yellow light from a sodium vapour lamp, (b) a gamma ray emitted by a radioactive nucleus, (c) a radio wave emitted by the antenna of a commerical radio station, (d) a microwave beam emitted by airport traffic control radar.
Rank the following radiations according to their associated photon energies, greatest first : (a) yellow light from a sodium vapour lamp, (b) a gamma ray emitted by a radioactive nucleus, (c) a radio wave emitted by the antenna of a commerical radio station, (d) a microwave beam emitted by airport traffic control radar.
Text Solution
AI Generated Solution
To rank the given radiations according to their associated photon energies, we will use the relationship between the energy of a photon and its wavelength. The energy (E) of a photon is given by the equation:
\[ E = \frac{hc}{\lambda} \]
where:
- \( E \) is the energy of the photon,
- \( h \) is Planck's constant (\( 6.626 \times 10^{-34} \, \text{Js} \)),
- \( c \) is the speed of light (\( 3 \times 10^8 \, \text{m/s} \)),
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Knowledge Check
Rank the following radiations according to their associated energies, greatest first. (1) yellow light from a sodium lamp (2) gamma ray emitted by a radioactive nucleus (3) radio wave emitted by the antenna (4) microwave beam emitted by radar
Rank the following radiations according to their associated energies, greatest first. (1) yellow light from a sodium lamp (2) gamma ray emitted by a radioactive nucleus (3) radio wave emitted by the antenna (4) microwave beam emitted by radar
A
(2), (1), (4), (3)
B
(1), (2), (3), (4)
C
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D
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When ultraviolet radiation is incident on a surface, no photoelectrons are emitted. If another beam causes photoelectrons to be emitted from the surface, it may consist of (i) radio waves (ii) infrared rays (iii) X-rays (iv) gamma rays
When ultraviolet radiation is incident on a surface, no photoelectrons are emitted. If another beam causes photoelectrons to be emitted from the surface, it may consist of (i) radio waves (ii) infrared rays (iii) X-rays (iv) gamma rays
A
(i),(ii)
B
(ii),(iii)
C
(i),(iv)
D
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