Question

object is placed 0.28 metres from a concave mirror whose focal length is 0.1 metres find where the images formed is the image real or virtual​

Answer 1

Answer:

real image

Explanation:

virtual will not be formed

Answer 2

Answer:

Given:

f= 0.1

u=0.28

v=?

h'/h=?

1/f = 1/u+1/v

1/10=1/28+1/v

1/v= 1/28-1/10

v= -28+10/280 =-18/280 = -9/140

v= -140/9

v= 15.5cm

or

v=-0.155m

Now,

m=-v/u

m=-(-15.5)/(-28)

m=-1× [140/9×28]

m= -5/9

m=h'/h

-5/9 = h'/4

h'= -20/9 =-2.22cm

h'=-2.22cm

∴v=-0.155cm

h'=-0.222cm

The Image is real image.

The image is formed at -0.155cm