- ASelective absorption of unpolarised light.
- BSelective absorption of dispersed light.
- CSelective absorption of scattered light.
- DSelective absorption of one of the polarised component.
Explanation:
Dichromism is the selective absorption of one orthogonal polarization component of an incident beam over the other. this phenomenon is due to anisotropy of the material, with one polarization component experiencing preferential absorption.
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Eddy currents are produced when
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(a) A metal is kept in varying magnetic field |
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(b) A metal is kept in the steady magnetic field |
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(c) A circular coil is placed in a magnetic field |
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(d) Through a circular coil, current is passed |
Light waves can be polarised as they are
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(a) Transverse |
(b) Of high frequency |
(c) Longitudinal |
(d) Reflected |
The electron in a hydrogen atom makes a transition from an excited state to the ground state. Which of the following statements is true
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(a) Its kinetic energy increases and its potential and total energies decrease |
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(b) Its kinetic energy decreases, potential energy increases and its total energy remains the same |
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(c) Its kinetic and total energies decrease and its potential energy increases |
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(d) Its kinetic, potential and total energies decreases |
Assertion : The stars twinkle while the planets do not.
Reason : The stars are much bigger in size than the planets.
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(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
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(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
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(c) If assertion is true but reason is false. |
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(d) If the assertion and reason both are false. |
A wire of length L metre carrying a current of I ampere is bent in the form of a circle. Its magnitude of magnetic moment will be
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(a) |
(b) |
(c) |
(d) |