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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.
Related Questions: - If a magnetic substance is kept in a magnetic field, then which of the following
- If the image formed by a convex mirror of focal length 30 cm is a quarter of the size
- A current of 2A flows through a 2Ω resistor when connected across a battery
- A transformer is used to light a 100 W and 110 V lamp from a 220 V mains.
- Which dimensions will be the same as that of time?
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- If a magnetic substance is kept in a magnetic field, then which of the following
- If the image formed by a convex mirror of focal length 30 cm is a quarter of the size
- A current of 2A flows through a 2Ω resistor when connected across a battery
- A transformer is used to light a 100 W and 110 V lamp from a 220 V mains.
- Which dimensions will be the same as that of time?
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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