Q. The perfect instrument for measuring the temperature of lava is

View solution

Q. Optical fibers are made up of

View solution

Q. The inner part of the fiber optics which carries light is called

View solution

Q. The outer concentric shell of the fiber optics is called

View solution

Q. As compare to copper wires, the optical fibers carry

View solution

Q. As compare to copper wires, the optical fibers are

View solution

Q. A medical device using optical fibers to enable doctors to see organs inside a human body, such as intestine, is called

View solution

Q. Total internal reflection takes place only when a ray of light travels from an optically denser to a

View solution

Q. A medical procedure using any type of endoscope is called

View solution

Q. Which of the following is used in fiber optics?

View solution

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