Advertisements
Advertisements
प्रश्न
A boy stands 4 m away from the plane mirror. If the boy moves `1/2` m towards the mirror, what is now the distance between the boy and his image? Give a reason for your answer.
Advertisements
उत्तर
Distance of boy from the plane mirror = u = 4 m When boy moves `1/2` m towards the mirror.
Then, distance between boy and mirror = 4 – `1/2` = `7/2` m
We know, in a plane mirror, the image formed is as behind the mirror as the object is in front of it.
So, distance between the mirror and image of boy = `7/2` m
Distance between the boy and his image
= Distance of boy from mirror + Distance of image of boy from mirror.
`= 7/2 + 7/2 = (7 + 7)/2 = 14/2` = 7 m
APPEARS IN
संबंधित प्रश्न
Write true or false of the following statement.
When a light ray is reflected from a wall, the angle of incidence is not equal to the angle of reflection.
Fill in the blank
The image formed by a plane mirror is erect and _____
Write three characteristics of the image formed by a plane mirror?
What is meant by lateral inversion of an image in a plane mirror? Explain it with the help of a ray diagram.
Prove geometrically that when plane mirror turns through a certain angle, the reflected ray turns through twice the angle.
Parallel rays are incident:
- on regular surface and
- on irregular surface. In what respect do reflected rays in (1) differ from those of (2)?
Write down the letters of the word ‘POLEX’ as seen in a plane mirror, held parallel to the plane of this paper.
Select the correct option:
A ray of light is incident on a concave mirror. If it is parallel to principal axis, the reflected ray will:
Select the correct option:
In case of concave mirror, the minimum distance between an object and its real image is:
