A pendulum oscillates 40 times in 4 seconds. Find it's time period and frequency. Explanation needed!
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A pendulum oscillates 40 times in 4 seconds. Find it's time period and frequency.

Frequency of oscillation is defined as the number of oscillation of a vibrating body per second.It is given by

The time period

The time required to complete one oscillation is known as Time period.

It is given by the inverse of the frequency.

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Therefore the frequency is

And the time period is

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convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.