Challenger App

No.1 PSC Learning App

1M+ Downloads
The angle between two mirrors of an optical square is equal to

A30°

B45°

C60°

D90°

Answer:

B. 45°


Related Questions:

When a rectangular section of a beam is subjected to a shearing force, the ratio of maximum shear stress to the average shear stress is
Turning the telescope in a horizontal plane is called:
An axially loaded member of length L and area of cross-section A is subjected to a tensile load of P. If E denotes the Young's modulus of elasticity, the strain energy stored in the member is equal to :
The least count of theodolite in measuring angle is
Alembert's principle is used for