Answer in detail.
a) What experiment can you perform to show that heat radiation can travel through
vacuum? Explain in detail.
Answers
Answer:
A radiometer, available at science shops for a few dollars, shows the energy inherent in infrared radiation. It has a sealed glass envelope, like a clear light bulb, containing a partial vacuum. Inside the envelope, four square vanes, with a black side and a white side, balance on a needle bearing. When you shine a light on the radiometer, the black side warms more than than the white side. Air molecules bounce off both sides, but the heat energy from the black side makes them push harder. This spins the vanes in the direction of the white side. Place the radiometer in bright sunlight and see how fast it spins. Then move it away from direct sunlight and observe that it moves more slowly.
Explanation:
Infrared waves are a form of electro-magnetic radiation and can travel in vacuum at the speed of light.
These infrared waves are resultant from the Sun. When these light come to the Earth's atmosphere, they create heat. These heat is created by the excitation of atoms that are present in the Earth's atmosphere.
So, the heat that we feel on Earth is due to the light or electromagnetic waves from the sun.