Two plane mirrors are kept parallel at 20 cm from each other. A point object O is placed exactly in between them. Calculate distance between second images formed by two mirrors.

Question

Two plane mirrors are kept parallel at 20 cm from each other. A point object O is placed exactly in between them. Calculate distance between second images formed by two mirrors. <img class="img-fluid question-image" alt="Question" src="https://cdn.tardigrade.in/q/nta/p-qyk3p08yv8sv.png" /> (A) 80 cm (B) 60 cm (C) 40 cm (D) 10 cm

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="Solution" src="https://cdn.tardigrade.in/q/nta/p-qyk3p08yrx30.png" /> From the diagram it is clear that Distance between I2 textI2' =(.30 + 20 + 30.) cm=80 cm

Q. Two plane mirrors are kept parallel at $20 c m$ from each other. A point object $O$ is placed exactly in between them. Calculate distance between second images formed by two mirrors.

$80 c m$

$60 c m$

$40 c m$

$10 c m$

From the diagram it is clear that Distance between $I_{2} & I_{2}^{^{'}}$
$= (30 + 20 + 30) c m = 80 c m$

Q. Two plane mirrors are kept parallel at 20cm from each other. A point object O is placed exactly in between them. Calculate distance between second images formed by two mirrors.

80cm

60cm

40cm

10cm