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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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Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two balls are dropped from heights h and 2h respectively. The ratio of times
- The transition from the state 3 n = 3 to n = 1 in a hydrogen like atom results
- A point charge q is placed at a distance x/2 directly above the centre of a cube
- The radius of the first orbit of the hydrogen atom is a₀. The radius of the second orbit
- A ballet dancer, dancing on smooth floor, is spinning about a vertical axis
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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