Question
Read the passage and answer the questions :
Seema builds a periscope using plane mirrors and observes people behind a wall.
Q.1. The periscope works on the principle of:
(a) Refraction$\quad$(b) Reflection
(c) Dispersion$\quad$(d) Diffraction
Q.2. The number of mirrors required in a simple periscope is:
(a) 1$\quad$$\quad$(b) 2
(c) 3$\quad$$\quad$(d) 4
Q.3. Which angle do the mirrors make in a periscope?
(a) $45^{\circ}$$\quad$(b) $60^{\circ}$
(c) $90^{\circ}$$\quad$(d) $180^{\circ}$
Seema builds a periscope using plane mirrors and observes people behind a wall.
Q.1. The periscope works on the principle of:
(a) Refraction$\quad$(b) Reflection
(c) Dispersion$\quad$(d) Diffraction
Q.2. The number of mirrors required in a simple periscope is:
(a) 1$\quad$$\quad$(b) 2
(c) 3$\quad$$\quad$(d) 4
Q.3. Which angle do the mirrors make in a periscope?
(a) $45^{\circ}$$\quad$(b) $60^{\circ}$
(c) $90^{\circ}$$\quad$(d) $180^{\circ}$
