Question

ANSWER THE FOLLOWING IN DETAILS: (2 X 4 = 8m)
8. Bharath stands in front of a plane mirror at a distance of 8m from the mirror and
Observes his image in the mirror. If he moves 6m towards the plane mirror, then what
will be the distance between Bharath and his image?
9. The sounds of crickets (insects) make us close our ears. Why?​

Answer 1

Explanation:

Distance of bharath from mirror=8m

as we know,

distance from mirror to image=distance from bharath to mirror

=8m+8m= 16m

then,

he goes 6m towards the mirror means 16-2×6

16-12

=4

Answer 2

Explanation:

The sounds of Crickets(insects) makes us close our ears because, the frequency and pitch of their sound is high. The frequency of sounds of cricket is in ultrasonic range that is nearly 20,000hz. So, we are unable to hear the sound. so sounds of the crickets make close our ears