What is and example of radiant energy?

Answer 1

Anything that is not at absolute zero (0 K, i.e. everything) will emit radiant energy. Radiant energy is caused by electron configuration changes within the substance, whether it be liquid, solid, or gas. It is transported between objects via electromagnetic waves, which means that it does not require any matter between the two objects in order to transfer energy. Examples would be the sun emitting radiation to the earth through space, or a radio antenna emitting radiation to your car's stereo. There doesn't need to be air between the antenna and your car in order for you to pick up a signal.

Radiate Energy can be carried by light too!

Radiation Transfers Energy

Energy can be transferred even though there are no particles to transfer the energy. This type of energy transfer is called radiation. Energy that is transferred in this way is called radiant energy or electromagnetic radiation (EMR for short).

Radiant energy travels in waves (much like a tsunami).

These waves can travel through space, air, glass and many other materials. There are different forms of EMR, including radio waves, microwaves, visible light and X-rays.

If the energy source is a warm object, like the sun, some of the thermal energy is transferred as a type of EMR called infrared radiation (IR) or 'heat radiation'.

Properties (characteristics) of Radiant Energy are:

Waves of radiant energy can travel in a vacuum.

All waves travel, across empty space, at an extremely high speed (300 Million m/s).

Radiant energy travels in a straight line.

they behave like waves

they can be absorbed and reflected by objects

All kinds of radiant energy interact with matter:

Reflection occurs if the energy cannot penetrate the surface of the material it comes into contact with.

Absorption occurs if the energy penetrates part way into the object.

Transmission occurs if the energy penetrates completely, passing through the object with no absorption of energy.

Absorbing / Emitting Energy

Dull dark objects absorb radiant energy when they are cool, and emit radiant energy when they are hot. (eg. asphalt sidewalk)

Light, shiny objects or surfaces do not absorb radiant energy readily and do not emit radiant energy readily. (eq. ice surface)

Radiant emission of energy from the body depends on surface area (smaller areas help to retain heat, whereas, larger areas radiate heat). This is evident in the adaptations of many species of animals who have successfully adapted to their environments.(desert animals - eg. Fox p. 140) (killer whales-The killer whale's fusiform body shape and reduced limb size decreases the amount of surface area exposed to the external environment. This helps killer whales conserve body heat.) The polar bear has black skin to absorb radiant energy with transparent hair that transmitts ultraviolet radiation to the skin.

Most radiation (82%) people are exposed, to comes from natural sources. By far the largest source is radon, an odorless, colorless gas given off by natural radium in the Earth's crust. Artificial radiation, mostly from medical uses and consumer products, accounts for about eighteen percent of our total exposure. The nuclear industry is responsible for less than one percent.

Radiation can be detected, measured and controlled.

The measurement of radiation is by the amount of radioactivity present

or the amount of radiant energy given off.

Radiation in the Environment

Radiation is a natural part of our environment. Humans have always lived on earth in the presence of radiation. Natural radiation reaches earth from outer space and continuously radiates from the rocks, soil, and water on the earth. Background radiation is that which is naturally and inevitably present in our environment. Levels of this can vary greatly. People living in granite areas or on mineraliscd sands receive more terrestrial radiation than others, while people living or working at high altitudes receive more cosmic radiation. A lot of our natural exposure is due to radon. a gas which seeps from the earth's crust and is present in the air we breathe.

Answer 2

That's any electromagnetic radiation with wavelengths between roughly

380 - 750 nanometers. Human eyes are sensitive to those wavelengths,

so we know whenever there's any of that stuff floating around, and we

call it "visible light".

Answer 3

Strictly speaking, light is radiant energy. Electromagnetic (EM) radiation occurs across a broad spectrum of frequencies. The visible spectrum (light) is part of this continuum. Microwaves, gamma rays, X-rays, infrared radiation, and visible light are all different ways of describing EM radiation occurring in certain frequencies and bandwidths.

Answer 4

An example of radiant energy is sunlight. Sunlight is a form of electromagnetic radiation that is emitted by the sun and carries energy.

Answer 5

radiant energy- the energy carried by light an example of radiant energy are light bulb, sun,car light, stove , fire, and moon

Answer 6

radiant energy is generated through the sun.

Answer 7

It comes from the sun's rays.

Answer 8

the sun or visible light

Answer 9

Radiant is the energy of light.

Answer 10

the energy carried by light