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  • The focal length f is related to the radius of the curvature r of the spherical convex mirror by: Option: 1 <img alt="f = +\frac {1}{2}r" src="https://entrancecorner.codecogs.com/gif.latex?f%20%3D%20&plus;%5Cfrac%20%7B1%7D%7

The focal length f is related to the radius of the curvature r of the spherical convex mirror by:
Option: 1 f = +\frac {1}{2}r
Option: 2 f = -\frac {1}{2}r
Option: 3 f=r
Option: 4 f=-r

Answers (1)

best_answer

In the case of spherical mirrors, there are some sign conventions that we need to consider:-

1. All distances are measured from the pole of the mirror.

2. Distances measured in the direction of the incident ray are positive and the distances measured in the direction opposite to that of the incident rays are negative.

For convex mirror, focus is behind the mirror and is taken to positive that is in the direction of incident ray.

\therefore f=+\frac{r}{2}

 

Posted by

avinash.dongre

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