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Which of the following is an example of ideal black body?
Options
(a) Kajal
(b) Black board
(c) A pin hole in a box
(d) None of these
Correct Answer:
A pin hole in a box
Explanation:
A pin hole in a box is an example of black body. The pin hole allows radiations of different wavelengths to enter the box. Inside box all the radiations are absorbed. No waves are permitted to escape. Hence it acts like an ideal black body.
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- Large transformers, when used for some time, become hot and are cooled by circulating
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- which of the following can not be emitted by radioactive substances during their decay?
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The periodic waves of intensities I₁ and I₂ pass through a region at the same time
- In the middle of the depletion layer of a reverse-biased P-N junction, the
- Large transformers, when used for some time, become hot and are cooled by circulating
- The moment of inertia of a thin circular disc about an axis passing through its centre
- which of the following can not be emitted by radioactive substances during their decay?
Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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