Q. Total internal reflection takes place only when the angle of incidence in the optically denser medium is

View solution

Q. Telephone conversations and internet data are now transmitted across continents using

View solution

Q. As compare to copper wires, the loss of signal in optical fiber is

View solution

Q. The angle of incidence in the optically denser medium for which the angle of refraction is less dense medium is 90° is known as

View solution

Q. In periscopes, prisms are positioned to reflect light through

View solution

Q. When light passes from an optically denser to a less denser medium, there occur

View solution

Q. Binoculars make use of prisms to

View solution

Q. Thermal energy always flow from a region of

View solution

Q. The thermal energy is transferred only when there is

View solution

Q. Thermal energy is transferred by

View solution

Q. The boiling point of water is

View solution

Q. Water freezes to form ice at

View solution

Q. We are able to see everything around us because of

View solution

Q. A bundle of light rays form a

View solution

Q. The objects that do not give off light are known as

View solution

Q. Light travels in

View solution

Q. The objects that give off light are known as

View solution

Q. It is possible for light to circle the Earth more than seven times in

View solution

Q. Which of the following is true?

View solution

Q. The types of light beam are

View solution