MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Gamma Rays

Explain why a...

Question

Explain why a body with large reflectivity is a poor emitter.

Open in App

Solution

A body with a large reflectivity is a poor absorber of light radiations. A poor absorber will in turn be a poor emitter of radiations. Hence, a body with a large reflectivity is a poor emitter.

Suggest Corrections

thumbs-up

0

Similar questions

Q. Explain why :
(a) A body with large reflectivity is a poor emitter
(b) A brass tumbler feels much colder than a wooden tray on a chilly day
(c) An optical pyrometer (for measuring high temperatures ) calibrated for an ideal black body radiation gives too low a value for the temperature of a red hot iron piece in the open but gives a correct value for the temperature when the same piece is in the furnace
(d) The earth without its atmosphere would be inhospitably cold
(e) Heating systems based on circulation of steam are more efficient in warming a building than those based on circulation of hot water

Q. Why does the objective of an optical telescope have large focal length and large aperture? Also explain why does a telescope give better image of a small portion of the celestial body?

Explain the meaning of the statement 'electric charge of a body is quantized'.

Why can one ignore qunatization of electric charge when dealing with macroscopic, i.e., large scale charges?

Q. A ____ is a large body with salt water.

Q. When lightning strikes the Earth, a large number of charge particles enter the Earth. Does it become a charged body due to this? Explain with reasons.

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Gamma rays

PHYSICS

Watch in App

explore_more_icon

Explore more

Standard X Physics

Join BYJU'S Learning Program

CrossIcon