- A[L-2 T A].
- B[L-1 T A].
- C[L T A].
- DNone.
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A ray of light is incident on a transparent glass slab of refractive index 1.62. The reflected and the refracted rays are mutually perpendicular. The angle of incidence is
|
(a) 58.3o |
(b) 50o |
(c) 35o |
(d) 30o |
In which of the following the final image is erect?
The human eye has a lens which has a
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(a) Soft portion at its centre |
(b) Hard surface |
|
(c) Varying refractive index |
(d) Constant refractive index |
In frequency modulation
|
(a) The amplitude of modulated wave varies as frequency of carrier wave |
|
(b) The frequency of modulated wave varies as amplitude of modulating wave |
|
(c) The amplitude of modulated wave varies as amplitude of carrier wave |
|
(d) The frequency of modulated wave varies as frequency of modulating wave |
If half life of radium is 77 days. Its decay constant in day will be
|
(a) 3 |
(b) |
(c) 1 |
(d) 6 |