Question

(ii) Which zone
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the incident ray? 60
() What is the angle of incidence of a ray if the reflected ray is at an angle of 90° to
(iv) A pendulum oscillates 20 times in 4 seconds. Find its time period. 5 H2
Chromium plating is done on many objects such as car parts, bath taps, kitchen​

Answer 1

Answer:

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Explanation:

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