- 2016:
The correct answer is (B).
When a ray of light is incident at an angle of incidence i on a refracting surface of a prism, if the angle of refraction r is such that r > i, the prism is said to be divergent. This is because the light is refracted away from the normal to the refracting surface.
- 2017:
The correct answer is (B).
The magnification of a concave mirror is given by the formula:
m = -f/u
where m is the magnification, f is the focal length of the mirror, and u is the object distance.
In this case, the image is real, inverted, and magnified, so the magnification is m = -1. This means that the focal length of the mirror is f = -u.
- 2018:
The proof is as follows:
\begin{align}
\mu &= \frac{\sin i}{\sin r} \\
&= \frac{\sin (A + \Phi)}{\sin \Phi}
\end{align}
