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A cat is looking into a concave mirror that is 12.0cm from her nose. I see her focused real image 16.8cm from the mirror. Determine the focal length and radius of curvature of the mirror.
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43 votes
A cat is looking into a concave mirror that is 12.0cm from her nose. I see her focused real image 16.8cm from the mirror. Determine the focal length and radius of curvature of the mirror.

User Radical
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1 Answer

12 votes
12 votes

1/di + 1 /do = 1/ f

di = 16.8 cm

d0= 12 cm

1/ 16.8 + 1 /12 = 1/f

f = 7 cm

focal lenght = 7 cm

r = 2f = 2* 7 = 14 cm

Answers:

Focal lenght= 7cm

Radius = 14 cm

User Mabdullah
by
3.2k points
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