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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
- A uniform force of (3i + j) newton acfs on a particle of mass 2kg
- Steam at 100⁰C is passed into 20 g of water at 10°C. When water acquires a temperature
- C and Si both have same lattice strcture, having 4 bonding electron in each
- The photoelectric threshold wevelength for potassium (work function being 2 eV) is
- The number of significant figures in 0.06900
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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