Optics

Which one of the following phenomenon is used in optical fibres?

In fiber‑optic communication, the signal travels in the form of—

Consider the following statements: 1. Fibre optics is based on the principle of total internal reflection. 2. In an optical fibre communication system, power consumption is extremely low. 3. Optical fibre communications are free from radio frequency interference. 4. In India, Reliance Group of Industries is engaged in the manufacture of the optical fibre. Which of these statements are correct?

‘Endoscope’ used by the doctors for examining the inside of patient’s stomach, works on the principle of—

An endoscope is used by a physician to view the internal parts of a body organ. It is based on the principle of—

The reason of mirage is

Mirage formation is an example of—

Consider the following natural phenomena: 1. Terrestrial heating 2. Reflection of light 3. Refraction of light 4. Diffraction of light Due to which of these phenomena is mirage formed?

Which one of the following reflects back more sunlight as compared to other three?

The technique to integrate and mark the image of a three‑dimensional object is