Question

0 (a) Define the principal focus of convex mirror.
(b) Name the type of mirror used in following situations and give reason
(ii) Rear view mirror of vel
(1) Headlights of a car
11 (a) Define focal length of a divergent lens.
(1) A concave lens has focal length of 15 cm. At what distance should
lens be placed so that it forms an image at 10 cm from the le
magnification produced by the lens.
2 (a) Write one example for each of decomposition reaction-
(i) Electricity
(ii) Heat
(iii) Light
What hapens to​

Answer 1

Answer:

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