(b) Is the image erect or inverted? (c) What is the focal length of the mirror?

Question

(b) Is the image erect or inverted?

(c) What is the focal length of the mirror?
________? m (b) Is the image erect or inverted? (c) What is the focal length of the mirror? ________? m Shaving/makeup mirrors typically have one flat and one concave(magnifying) surface. You find that you can project a magnifiedimage of a light bulb onto the wall of your bathroom if you holdthe mirror 1.6 m from the bulb and5.5 m from the wall. (Include the signof each answer.)(a) What is the magnification of the image? _______?

Explanation / Answer

Given : .               Object distance (u) = 1.6 m .               Image distance (v) = 5.5 m . (a)   Magnification is : .               M = - v / u = - 5.5 / 1.6  = - 3.4375 m . (b) Image is inverted since   M <0 . (c)   We have : .         1 / f  = 1 / u + 1 / v .                 = 1 / 1.6   + 1 / 5.5 .          f      =    1.239 m . Hope this helps u!

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