Question

A periscope works by the principle of
A) Total internal reflection
B) Refraction
C) Diffraction
D) Reflection & Refraction

Answer 1

A periscope works by the principle of A) Total internal reflection

• Periscope is an optical instrument used in land and sea warfare, submarine navigation.
• It is the simplest arrangement of mirrors at each end of a case set parallel to each other at a 45° angle and works using the principle of TIR.
• The simple periscopes use only flat mirrors, whereas the periscopes used on submarines use both lenses and mirrors.

Answer 2

Answer:

A) Total internal reflection