Explain Laws of Reflection
Consider a ray of light, AO, incident on a plane mirror ICY at O. It is reflected along OB. Let the normal ON is drawn…
Physics
Define Reflection of Light
Highly polished metal surfaces reflect about 80% to 90% of the light incident on them. Mirrors in everyday use are therefore usually made of depositing…
Define Light Rays and Beams
A ray of light or light rays are the direction along which the light energy travels. In practice, a ray has a finite width and…
Define and Discuss on Angstrom Pyrheliometer
Pyrheliometer is an instrument used to measure the quantity of heat radiation and solar constant. It is a type of actinometer that can measure solar…
Explain Surface Temperature of the Sun
The Sun is a perfect black body of radius r and surface temperature T. According to Stefan’s law, the energy radiated by the Sun per…
What is Solar Constant?
The solar constant is the amount of radiant energy received per second per unit area by a perfect black body on the Earth with its…
Experimental Verification of Newton’s Law of Cooling
Isaac Newton created his revolutionary Law of Cooling in the 17th century. Newton s law of cooling states that the rate of cooling of a…
What is Newton’s Law of Cooling
Newton’s law of cooling states that the rate of cooling of a body is directly proportional to the temperature difference between the body and the…
Stefan’s Law
Stefan’s law states that the total amount of heat energy radiated per second per unit area of a perfect black body is directly proportional to…
Wien’s Displacement Law
Wien’s displacement law states that the wavelength of the radiation corresponding to the maximum energy (λm) decreases as the temperature T of the body increases.…
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