Question

an object is placed at a distance of 30 cm from a convex mirror of focal length 10 cm find the image distance its nature and its position​

Answer 1

Answer:

Using the Real Is Positive convention:

Explanation:

u=+30 and f=-10

1/u+1/v=1/f

1/30 + 1/v = -1/10

1/v = -1/10 - 1/30 = -3/30 - 1/30 = -4/30

v = -30/4 = -7.5 cm meaning virtual and erect. And quarter the size of the object.

Answer 2

Answer:

convex mirror

u= -30 cm

f= 10cm

v=?

1/f=1/u+ 1/v

1/v= 1/f- 1/u

= 1/ 10 - 1/-30

= 1/10+1/30

= 2/30

v = 1/15

v=15cm

image is real and inverted

v=15