MCQ
Yellow light is refracted through a prism producing minimum deviation. If $i_1$ and $i_2$ denote the angle of incidence and emergence for the prism, then ..........
  • $i_1=i_2$
  • B
    $i_1 > i_2$
  • C
    $i_1 < i_2$
  • D
    $i_1+i_2=90$

Answer

Correct option: A.
$i_1=i_2$
a
(a)

At angle of minimum deviation angle of emergence of prism is same as angle of incidence.

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

Similar questions

Three rods of identical cross-section and lengths are made of three different materials of thermal conductivity $K _{1}, K _{2},$ and $K _{3}$, respectively. They are joined together at their ends to make a long rod (see figure). One end of the long rod is maintained at $100^{\circ} C$ and the ther at $0^{\circ} C$ (see figure). If the joints of the rod are at  $70^{\circ} C$ and $20^{\circ} C$ in steady state and there is no loss of energy from the surface of the rod, the correct relationship between $K _{1}, K _{2}$ and $K _{3}$ is 
At what distance in front of a concave mirror of focal length $30\; cm$, an object be placed (in $cm$) so that its real image of size three times that of the object is obtained?
Alpha particles are
Gas escapes from the surface of a planet because it acquires an escape velocity. The escape velocity will depend on which of the following factors :

$I.$ Mass of the planet

$II.$ Mass of the particle escaping

$III.$ Temperature of the planet

$IV.$ Radius of the planet

Select the correct answer from the codes given below :

The current in a coil of self inductance $2.0 \,H$ is increasing according to $I =2 \sin \left( t ^{2}\right) A$. The amount of energy spent during the period when current changes from $0$ to $2\, A$ is......$J.$
Sunlight of intensity $1.3 kW m ^{-2}$ is incident normally on a thin convex lens of focal length $20 cm$. Ignore the energy loss of light due to the lens and assume that the lens aperture size is much smaller than its focal length. The average intensity of light, in $kW m ^{-2}$, at a distance $22 cm$ from the lens on the other side is. . . . .
$A$ semicircle conducting ring of radius $R$ is placed in the $xy$ plane, as shown in the figure. $A$ uniform magnetic field is set up along the $x$ -axis. No $emf$, will be induced in the ring. if
A uniform rod of density $\rho $ is placed in a wide tank containing a liquid of density ${\rho _0}({\rho _0} > \rho )$. The depth of liquid in the tank is half the length of the rod. The rod is in equilibrium, with its lower end resting on the bottom of the tank. In this position the rod makes an angle $\theta $ with the horizontal
Two coils of self inductance $100\,mH$ and $400\,mH$ are placed very close to each other. Find the maximum mutual inductance between the two when $8\,A$ current passes through them.......$mH$
Assertion : $RCOCl, (RCO)_2O$ and $RCOOR$’ all react with Grignard reagents to form $3^o$ alcohols.
Reason : $RCOCl$ reacts with $R_2Cd$ to form ketones but $(RCO)_2O$ and $RCOOR'$ do not react at all.