Most of the ultraviolet radiation in sunlight is absorbed by oxygen in Earth's atmosphere, which forms the ozone layer of the lower stratosphere. UV light is found in sunlight (where it constitutes about 10% of the energy in vacuum) and is emitted by electric arcs and specialized lights such as black lights. It can cause chemical reactions, and causes many substances to glow or fluoresce. Most ultraviolet is classified as non-ionizing radiation.
When a forward bias is applied to a p-n junction, it
In a plane electromagnetic wave. the electric field oscillates sinusoid ally at a frequency of 3 × 108 Hz and amplitude 36 V/m. Find the am...
The velocity of heat radiation in a vacuum is?
Cryogenics is the branch of physics that deals with what?
Which instrument is primarily used to measure the relative density of liquids by utilizing the principle of buoyancy?
Which law states that the induced electromotive force (e.m.f.) is proportional to the rate of change of magnetic flux linkage?
Which of the following phenomena establishes the transverse nature of light waves?
If a medium has a critical angle for total internal reflection from the medium to vacuum as 90°, what is the velocity of light in the medium? (Take c =...
X-rays belong to which category of waves?
Newton’s second law of motion primarily explains which of the following?
