Question

When an object of 0.5 cm. high is placed i
at 10 cm from a concave mirror, a real
image is formed which is four times higher
than the object. Find the position of the
image and focal length of the mirror.​

Answer 1

AnswEr:-

• Position Of Image:- 40 cm in front of the mirror i.e. -40 cm.

• Focal Length:- -8 cm.

ExplanaTion:-

See The Attachment For Explanation.

More Related Information:-

• The Magnification of a real image is always negative.

• The Magnification of a erect image is always positive.

• The focal length of any concave mirror is always negative.

• The focal length of any convex mirror is always positive.

• Magnification is also equals to the ratio of height of the image to the height of the object.