Question

which method is used to calculate the focal longth in concave mirror​

Answer 1

Answer:

method of image formation using candle wire guage and a screen on an optical bench

Answer 2

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To determine focal length of a given concave mirror

To obtain a clear, sharp image the screen should be adjusted. Using a metre scale the distance between the concave mirror and screen can be determined. The distance is the same as the focal length of the given concave mirror.

How do you find the focal length of a concave mirror with UV?

Calculate the focal length of the given concave mirror by using the relation, f = uv/(u+v). Repeat the experiment for different values of u (up to 2.5f) and in each time, measure v and record it in the tabular column. Calculate the focal length (f) of the concave mirror each time.