MCQ
For an equilateral prism, it is observed that when a ray strikes grazingly at one face it emerges grazingly at the other. Its refractive index will be
- A$\sqrt 3$
- B$\frac{2}{\sqrt 3}$
- ✓$2$
- Ddata not sufficient
✓
Answer
Correct option: C.
$2$
c
$\mathrm{i}_{1}=\mathrm{i}_{2}=90^{\circ}, \mathrm{r}_{1}=\mathrm{r}_{2}=\frac{\mathrm{A}}{2}=30^{\circ}$
$\mathrm{i}_{1}=\mathrm{i}_{2}=90^{\circ}, \mathrm{r}_{1}=\mathrm{r}_{2}=\frac{\mathrm{A}}{2}=30^{\circ}$
$\mu=\frac{\sin \mathrm{i}_{1}}{\sin \mathrm{r}_{1}}=2$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A paralle plate capacitor is made up of stair like structure with a palte area $A$ of each stair and that is connected with a wire of length $b$, as shown in the figure. The capacitance of the arrangement is $\frac{ x }{15} \frac{\varepsilon_{0} A }{ b }$. The value of $x$ is ............
→An atom of nuclean change q is placed on a line. There particles A$($mass $= m$, change $= q), B($mass $= 2$, change $=q)$ and $C($mass $= 3m$, change $= 3q)$ are shot towards the atom, a distance $r$ away from the line and parallel to it. The particle that would be deflected the most would be?
→Two coherent sources of different intensities send waves which interfere. The ratio of maximum intensity to the minimum intensity is 25. The intensities of the sources are in the ratio
The collector plate in an experiment on photoelectric effect is kept vertically above the emitter plate. Light source is put on and a saturation photocurrent is recorded. An electric field is switched on which has a vertically downward direction.
Charge motion within the Gaussian surface gives changing physical quantity:
A particle of charge q and mass m moves in a circular orbit of radius r with angular speed ω. The ratio of the magnitude of its magnetic moment to that of its angular momentum depends on
A $10$ metre wire kept in east-west falling with velocity $5 \,m/sec$ perpendicular to the field $0.3 \times {10^{ - 4}}Wb/{m^2}$. The induced e.m.f. across the terminal will be
→The correct equation of nuclear fusion reaction is:
The variation of magnetic susceptibility $(\chi )$with magnetising field for a paramagnetic substance is
→Six charges, three positive and three negative of equal magnitude are to be placed at the vertices of a regular hexagon such that the electric field at O is double the electric field when only one positive charge of same magnitude is placed at R. Which of the following arrangements of charges is possible for P, Q, R, S, T and U respectively
