What Are Poor And Good Radiators Of Heat?

Good radiators are substances which radiate heat .

dark bodies are generally good radiators

such a mud houses and black sweaters are good radiators. Bad radiators are generally bad radiators such as white clothes copper wires.

Which one is a good radiator of heat?

(d)

yellow

. Black colour is the best radiator and the best absorber of heat.

What is poor radiator of heat?

Radiation

is a mode of transmission of heat from the source to the receiver. The transfer of heat by radiation needs no medium. … The bodies whose temperature is not more than 0 K, can not emit radiant energy and thus are bad radiator of heat.

What kind of bodies are good absorbers and good radiators of heat?

According to Kirchhoff’s Law , Good absorbers are also a good radiators. So,

A perfect black body

also emmits all radiation of all wavelength at high temperature. Hence, A perfect black body is Good Absorber as well as Good Radiator.

Which bodies are poor absorbers and radiators of heat?

–

Shiny/silvery surfaces

are poor absorbers and poor radiators of heat.

Is ice a poor radiator of heat?

What are good absorbers of heat?

The good absorbers of heat are

good – emitters of heat

and are based on Kirchhoff’s radiation law. According to Kirchhoff’s law, a body strongly absorbs a radiation of certain wavelength, it must emit strongly the radiation of the same wavelength.

What is the meaning of radiator of heat?

A radiator gets hot, and it sends that heat out into the room — in other words, it

radiates heat

. In fact, the word radiator originally meant “anything that radiates,” including heat, light, or energy. By the 1850’s, radiator had come to primarily mean “heater in a building or house.” Definitions of radiator.

Is cotton a good radiator of heat?

Answer:

Cotton is good conductor of heat

. The heat of the sun which falls on our body gets dissipated easily to the atmosphere if we wear cotton and we feel cool. Synthetic clothes trap this heat and makes us uncomfortable.

Are black bodies good radiators of heat?

Answer: A perfect black body absorves all radiations of all wavelength completely. According to Kirchhoff’s Law ,

Good absorbers are also a good radiators

. … Hence, A perfect black body is Good Absorber as well as Good Radiator.

Are good absorbers of heat also good radiator?

At a given temperature the good radiator will radiate more energy than the

poor radiator

, and being a poor absorber it will absorb less.

Is Shining bodies are good absorbers and good radiators of heat?

As on shiny objects heat is incident; due to the polishing most of the heat energy gets reflected back and as a result very less energy (heat) is absorbed. So we can say that

shiny bodies are only good radiators of heat not good absorber

.

Are good radiators good conductors?

Conduction is when heat is conducted from a warm end to the cold end of something. …

Metals are very good conductors of heat energy

but any non-metal material and gases are poor conductors and are therefore better insulators. Metal radiators will therefore conduct the heat built up in the water inside.

Why are shiny surfaces poor radiators?

Shiny surfaces are

poor absorbers and emitters

(but they are good reflectors of infrared radiation). If two objects made from the same material have identical volumes, a thin, flat object will radiate heat energy faster than a fat object. This is one reason why domestic radiators are thin and flat.

Why are dull black surfaces good radiators?

So

black absorbs all the frequencies of light and doesn’t reflect so more heat

is produced in that , right .

Does dull surfaces absorb heat?