Question
A light ray is incident upon a prism in minimum deviation position and suffers a deviation of $34^o $. If the shaded half of the prism is knocked off, the ray will
✓
Answer
(c) By formula $\delta = (n - 1)A \Rightarrow 34 = (n - 1)A$ and in the second position $\delta ' = (n - 1)\frac{A}{2}$
$\therefore $ $\frac{{34}}{{\delta '}} = \frac{{(n - 1)A}}{{(n - 1)\frac{A}{2}}}$ or $\delta ' = \frac{{34}}{2} = {17^o}$
$\therefore $ $\frac{{34}}{{\delta '}} = \frac{{(n - 1)A}}{{(n - 1)\frac{A}{2}}}$ or $\delta ' = \frac{{34}}{2} = {17^o}$
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
To project a body of mass $m$ from earth's surface to infinity, the required kinetic energy is (assume, the radius of earth is $R_E, g=$ acceleration due to gravity on the surface of earth) :
→Two identical charged spheres are suspended by strings of equal lengths. The strings make an angle $\theta$ with each other. When suspended in water the angle remains the same. If density of the material of the sphere is $1.5 \mathrm{~g} / \mathrm{cc}$, the dielectric constant of water will be
→(Take density of water $=1 \mathrm{~g} / \mathrm{cc}$ )
Assertion : Cyclotron does not accelerate electron.
Reason : Mass of the electrons is very small
Figure below shows a body of mass $M$ moving with the uniform speed on a circular path of radius, $R$. What is the change in acceleration in going from ${P_1}$ to ${P_2}$
→For a cylinder of radius $R$ current density $J =J_0 \frac{r}{R} $, where $J_0$ is a constant and $r$ is distance from axis. Calculate total current
→Two blocks of same mass $(4\ kg)$ are placed according to diagram. Initial velocities of bodies are $4\ m/s$ and $2\ m/s$ and the string is taut. Find the impulse on $4\ kg$ when the string again becomes taut .......... $N-s$
→A mono atomic gas is supplied the heat $Q$ very slowly keeping the pressure constant. The work done by the gas will be
→A parallel plate capacitor with area $200\,cm^2$ and separation between the plates $1.5\,cm$, is connected across a battery of $emf$ $V$. If the force of attraction between the plates is $25\times10^{-6}\,N$, the value of $V$ is approximately........$V$ $\left( {{\varepsilon _0} = 8.85 \times {{10}^{ - 12}}\,\frac{{{C^2}}}{{N{m^2}}}} \right)$
→Two steel wires of same length but radii $r$ and $2r$ are connected together end to end and tied to a wall as shown. The force stretches the combination by $10\ mm$. How far does the midpoint $A$ move ............ $mm$
→The magnetic flux through a coil is inversely proportional to: