Embibe Experts Solutions for Chapter: Ray Optics, Exercise 3: Level 3

Alight wave travels from glass to water. The refractive index for glass and water are $\frac{3}{2}$ and $\frac{4}{3}$, respectively. The value of the critical angle will be

Statement I- Diamond is very bright.
Statement II- Diamond has a very low refractive index.

A step index fibre has a relative refractive index of $0.88\%$ What is the critical angle at the corecladding interface $\left(\sin 84°{24}^{\text{'}}=0.9912\right)$

A point object is placed at a distance of $30 \mathrm{cm}$ from a convex mirror of focal length $30 \mathrm{cm}$. The image will form at

A point object is placed at a distance of $10 \mathrm{cm}$ and its real image is formed at a distance of $20 \mathrm{cm}$ from a concave mirror. If the object is moved by $0.1 \mathrm{cm}$ towards the mirror, the image will shift by about

A thin rod of length $\frac{f}{3}$ lies along the axis of a concave mirror of focal length $f$. One end of its magnified image touches an end of the rod. The length of the image is

An infinitely long rod lies along the axis of a concave mirror of focal length $f$. The near end of the rod is at a distance $u>f$ from the mirror. Its image will have a length

A short linear object of length $b$ lies along the axis of a concave mirror of focal length $f$ at a distance $u$ from the pole of the mirror, what is the size of image?