Question

MIRROR IMAGES: A magic mirror enlarges the things 2 times. A triangle of side 3 cm, 4 cm, 5 cm is put in front of the mirror

1. Find the length of the largest side of the image of the triangle ?
a. 25 cm
b. 10 cm
c. 30 cm
d. 20 cm ​

Answer 1

Answer:

option (c) is 30 cm

Step-by-step explanation:

Given magnification m=3

and object distance u=10 cm and we know,

Magnification m=u−v

−v=3×−10

v=30 cm

Thus the image is formed at distance of 30 cm. 

Solve any question of Ray Optics and Optical Instrument with:-

Answer 2

a25

Step-by-step explanation:

by Pythagoras theorem should be applied here

(5)² = (3)² + (4)²

= 9+16

25 = 25