When light of wavelength is incident on an equilateral prism kept… - Vidyadip

MCQ

When light of wavelength $\lambda $ is incident on an equilateral prism kept in its minimum deviation position, it is found that the angle of deviation equals the angle of the prism itself. The refractive index of the material of the prism for the wavelength $\lambda $ is, then

✓
$\sqrt 3 $
B
$\frac{{\sqrt 3 }}{2}$
C
$2$
D
$\sqrt 2 $

✓

Answer

Correct option: A.

$\sqrt 3 $

a
( a)$\mu = \frac{{\sin \,\left( {\frac{{A + {\delta _m}}}{2}} \right)}}{{\sin \frac{A}{2}}}$ $ = \frac{{\sin \,\left( {\frac{{60^\circ + 60^\circ }}{2}} \right)}}{{\sin \,\left( {\frac{{60^\circ }}{2}} \right)}} = \sqrt 3 $

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 9. Ray optics abd optical instruments→9. Ray optics abd optical instruments — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

Magnetic field inside a solenoid is:

$A$ light ray is incident on a transparent sphere of index $= \sqrt 2 $ , at an angle of incidence $= 45^o$. What is the deviation of $a$ tiny fraction of the ray, which enters the sphere, undergoes two internal reflections, and then refracts out into air ?......$^o$

An elementary particle of mass $m$ and charge $ + e$ is projected with velocity $v$ at a much more massive particle of charge $Ze,$ where $Z > 0.$What is the closest possible approach of the incident particle

In a step up transformer, $220 \,V$ is converted into $200\,V$. The number of turns in primary coil is $600$. What is the number of turns in the secondary coil

The following figure $(i)$ shows a logic gate circuit with two inputs $A$ and $B$ output $C$. The voltage waveforms of $A,B$ and $C$ are as shown in the figure $(ii)$ given below The logic circuit gate is

Three equal charges are placed on the three corners of a square. If the force between $q_1$ and $q_2$ is $F_{12}$ and that between $q_1$ and $q_3$ is $F_{13}$, the ratio of magnitudes $\frac{F_{12}}{F_{13}}$ is

A paramagnetic substance in the form of a cube with sides $1\, cm$ has a magnetic dipole moment of $20 \times 10^{-6}\, J/T$ when a magnetic intensity of $60 \times 10^3\, A/m$ is applied. Its magnetic susceptibility is

A small pin fixed on a table top is viewed from above from a distance of $50\, cm$. By what distance would the pin appear to be raised if it is viewed from the same point through a $15\, cm$ thick glass slab held parallel to the table? Refractive index of glass $= 1.5$ ?......$cm$

Two parallel plates separated by a distance of 5mm are kept at a potential difference of 50 V. A particle of mass $10^{-15}$ kg and charge $10^{-11}$ C Centers in it with a velocity $10^{7}$ m/s. The acceleration of the particle will be

Two mutually perpendicular conductors carrying currents $I_1$ and $I_2$ lie in one plane. Locus of the point at which the magnetic induction is zero, is a