- ACorpuscular theory of light
- BQuantum nature of light
- CTransverse nature of light
- DAll of the above
Explanation:
Polarisation of light establishes that light are transverse in nature, otherwise it was believed that they are longitudinal waves, like the sound waves.
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An important spectral emission line has a wavelength of 21 cm. The corresponding photon energy is (h = 6.62 ![]()
|
(a) 5.9 |
(b) 5.9 |
(c) 5.9 |
(d) 11.8 |
The average binding energy per nucleon in the nucleus of an atom is approximately
|
(a) 8 eV |
(b) 8 KeV |
(c) 8 MeV |
(d) 8 J |
An electron experiences a force equal to its weight when placed in an electric field. The intensity of the field will be
|
(a) 1.7 |
(b) 5.0 |
(c) 5.5 |
(d) 56 N/C |
When a wave travels from one medium to another, the quantity which will not change is its:
In a Thomson set-up for the determination of e/m, electrons accelerated by 2.5 kV enter the region of crossed electric and magnetic fields of strengths 3.6
and 1.2
respectively and go through undeflected. The measured value of e/m of the electron is equal to
|
(a) 1.0 |
(b) 1.76 |
(c) 1.80 |
(d) 1.85 |
In a common base amplifier circuit, calculate the change in base current if that in the emitter current is 2 mA and a = 0.98
|
(a) 0.04 mA |
(b) 1.96 mA |
(c) 0.98 mA |
(d) 2 mA |