Question 1: | Find the focal length of a convex mirror whose radius of curvature is 32 cm. |
Answer : | Radius of curvature, R = 32 cm Radius of curvature = 2 × Focal length(f) R = 2f
Hence, the focal length of the given convex mirror is 16 cm. |
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Question 2: | A concave mirror produces three times magnified (enlarged) real image of object placed at 10 cm in front of it. Where is the image located? |
Answer : | Magnification produced by aspherical mirror is given by the relation,
Let the height of the object, ho = h Then, height of the image, hI = −3h(Image formed is real)
Object distance, u = −10 cm v = 3 × (−10) = −30 cm Here, the negative sign indicates that an inverted image is formed at a distance of |
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Friday 23 December 2011
Ch-10 Light - Reflection and Refraction (Question) Page171
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