Question

Physical science extra questions of 0 reflection of the light at curved surfaces problems

Answer 1

Q1. With the help of ray diagrams, show the formation of images of an object by a concave mirror. When it is placed

(i) beyond the centre of curvature (ii) at the centre of curvature.

Q2. Draw ray diagrams to show the formation of image by an object by a concave lens when the object is placed

(i) at infinity (ii) between infinity and optical centre of the lens.

Q3. Draw a labeled ray diagram to locate the image of an object formed by a convex lens of vocal length 20cm when the object is placed 30cm away from the lens.

Q4. What is meant by the power of a lens? What is its SI unit? Name the type of lens whose power is positive. The image of an object formed by a lens is real, inverted and of the same size as the object. If the image is at a distance of 40cm from the lens, what is the nature and power of the lens? Draw ray diagram to justify your answer.

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