Question

an object is kept 15cm away from a mirror. what is the focal length, nature of mirror and nature of image if it is formed at a distance of 5cm from the mirror jn the other side of the mirror
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Answer 1

Answer:

1/15 +1/5

Explanation:

the distance of the object from the mirror is 15 cm

that is 1/u=15cm

the distance of image from the mirror is 5 cm

therefore 1/v=5cm

by using the formula 1/u+1/v=1/f

we can substitute the values 1/15+1/5 =1/f

as the LCM is 15

1/15+1/5 is the answer

Answer 2

Answer:

u = -15 cm

v = 5 cm

f = ?

1/u+1/v=1/f

1/-15+1/5 = 1/f

f = 15/2

focal length is 7.5 cm

Diminished and Virtual image is formed

And the Mirror is concave

Explanation:

find the focal length by applying mirror formula