Question

an object 5 cm in length is placed at a distance of 20cm in front of concave mirror of radius of curvature 30cm.Find the position of the image‚ its nature and size​

Answer 1

Question ⤵

An object 5 cm in length is placed at a distance of 20cm in front of concave mirror of radius of curvature 30cm. Find the position of the image‚ its nature and size .

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Radius of curvature (R) = 30 cm

f = R/2 = 30/2 = 15 cm

u = -20 cm,

h= 5 cm.

➡ 1/v +1/u = 1/f

➡ 1/v = 1/15+ 1/20 = 7/60

➡ v = 60/7 = 8.6 cm.

Image is virtual and erect and formed behind the mirror.

➡ hi/h0 = v/u

➡ hi/5 = 8.6/20

➡ hi = 2.2 cm.

Size of image is 2.2 cm.

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Additional Information ⬇

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THANKS.

Answer 2

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