Question

Infrared radiations are also known as heat waves. Why? Also, name the radiation that is next to infrared radiation with
(a) Shorter wavelength
(b) Longer wavelength.

Answer 1

Hint: Infrared radiation in sunlight causes a heating effect.Earth absorbs infrared radiation which then converts it into thermal energy as the warmed air rises, cooler air sinks to the surface. Here we have to name the radiation that is next to radiation in the electromagnetic spectrum.

Complete answer:
The reason why infrared radiation is also known as heat wave is when water molecules of the material absorb this radiation. If it is exposed to the infrared radiation then this leads to increase of thermal motion of the water molecule which is present in the object. Infrared radiation is responsible for heating the earth 's surface. Sun causes heat by exciting electrons. Solar radiation is electromagnetic energy from the sun. . Electromagnet is a type of magnet in which a magnetic field is produced by passing an electric current. Electromagnet uses electricity to create their power of magnetism .They can be turned on and off when the electricity is turned on and off. Cranes use huge electromagnets to pick up scrap metals in junkyards. Heat and light are created by nuclear fusion. The greenhouse effect which has some strong effects like clouds which are present in the atmosphere reflects back a little sunlight before reaching to the ground which results in reduction of heat on the ground. (a) The radiations, next to infrared radiations,
having shorter wavelength will be visible light.(b) The radiations next to infrared radiations,
having a longer wavelength will be microwaves. Blue and violet Colour have the shortest wavelength. Red colour has the longest wavelength, but has lower energy visible light than violet. Different types of radiation are alpha, beta, neutrons and electromagnetic waves such as gamma rays. Blue light has shorter waves, and has a higher frequency which carries more energy than red. Gamma rays are very harmful.

Note: Alpha rays are the weakest which are usually blocked by human skin and gamma rays are the strongest and only dense elements like lead can block them. The Sun is the main source of heat, warmth, and light for organisms living on Earth. Without the sun's energy, Earth would be completely dark and freezing cold. The hottest thing in the universe is a supernova.