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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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- The potential energy of a long spring when stretched by 2 cm is U.
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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
- A long straight wire carries a certain current and produces a magnetic field
- The potential energy of a long spring when stretched by 2 cm is U.
- The velocity of radio-waves is 3×10⁵ km/s. The frequency corresponding to wavelength
- Dimensions of Torque are
- A wooden stick 2 m long is floating on the surface of water. The surface tension
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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