Question

A device which works on the reflection of light from two plane mirrors arranged parallel to one another is:
A. electroscope
B. kaleiodoscope
C. periscope
D. stethoscope

Answer 1

Answer:

c. Periscope

Explanation:

Periscope has two mirrors at an angle of 45 degree.

Answer 2

A device which works on two plane mirrors arranged parallel to one another is C. Periscope.

Explanation:

• It is an optical device.
• The principal followed in this device is reflection of light between two mirrors which are parallel to each other.
• Light from object incidence on the mirror and reflected to the mirror which is parallel to earlier mirror. The reflection from the latter mirror is reflected to eyes.
• This device is used to view the objects which are not in eyesight level.
• This device is majorly used in submarines and in army bunker.