Question

$\huge{\underline{\boxed{Challenge}}}$

An object of height 4 cm is placed at a distance of 15 cm in front of a concave mirror of focal length 10 cm. At what distance from the mirror should a screen be placed to obtain a sharp image of the object? Also, calculate the height of the image.
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Answer 1

Answer:

For the given concave mirror

f=-15 cm

u=-45 cm

Using mirror formula 1/u+1/v=1/f

u=-27.5 cm

As the object is lying behind 2f so image will be formed in between f and 2f . Image is real .

Answer 2

Answer:

For the given concave mirror

F=15 cm

U=45 cm

Using mirror formula1/u+1/v=1/f

u=27.5 cm

Ask the object is liying bihind 2f so image will be formed in between f and 2f image is real.