Question

12. An object is placed at a distance of 10 cm from a convex mirror of focal length
is the obje
15 cm. Find the position and nature of the image.
13. The magnification produced by a plane mirror is +1. What does this mean?
langth is placed at a distance of 20 cm in front​​

Answer 1

Explanation:

Answer:-

Given that

u= -10 cm

f= 15 cm

We need to find v

We know the formula

1/f = 1/v + 1/u

Therefore, 1/v= 1/f – 1/u

Substituting the known values in the above equation we get,

1/v= 1/15 + 1/10

1/v = (2+3)/30 (lcm)

Hencev=5/30 = 6 cm

v= 6cm

Nature of the image: The image is formed behind the mirror and it is virtual and erect.

Answer:-

The magnification produced by a plane mirror is +1 means that the image formed is virtual, erect and of the same size as that of object.

Answer 2

Answer:

Given

u=-10 cm

f= 15 cm

we need to find v

we know the formula: 1/f = 1/v + 1/u

therefore, 1/v = 1/f - 1/u

substituting the know values in rahe above equation we get,

1/v = 1/15 + 1/10

1/v = (2+3)/30 (LCM)

hence v = 5/30 = 6cm

v = 6 cm

Natura of the image : the image is formed behind the mirror and it is virtual and erect

the magnification produced by a plane mirror is + 1 means that the image formed is virtual, erect and of the same size as that of object