Beams of red, green and violet light are falling on the refracting face of a thin prism, all at same angle of incidence. If their angles of deviation are ${\theta }_1,{\theta }_2$ and ${\theta }_3$ respectively, then

Q. A glass prism with a refracting angle of ${60}^0$ has a refractive index 1.52 for red and 1.6 for violet light.A parallel beam of white light is incident on one face at an angle of incidence, which gives minimum deviation for red light. Find the angle of incidence at the prism is
$\left[Use:\sin \left({50}^0\right)=0.760;\sin \left({31.6}^0\right)=0.520;\sin \left({28.4}^0\right)=0.475;\sin \left({56}^0\right)=0.832;=22/7\right]$

Q. Contact angle of different liquids on pure glass surface are ${\theta }_1,{\theta }_2$ and ${\theta }_3$ and their wettability are represented as $w_1,w_2$ and $w_3$ respectively. If ${\theta }_1>{\theta }_2>{\theta }_3$, then

Q. A prism of refractive index $\sqrt{2}$ and refracting angle A produces minimum deviation ${\delta }_m$ of a ray on one face at an angle of incidence ${45}^{\circ }$, The values of A and ${\delta }_m$ are respectively.

Q. A parallel beam of light falls normally on face AB of a thin prism and under goes a deviation ${\left(\frac{5}{4}\right)}^0$ on passing through the prism. The part of the beam which is reflected internally at the face AC, on emergence from the face AB, makes an angle $6^o{30}^{\prime }$ with the incident beam. Calculate the angle of the prism and the refractive index of the material of the prism.

Q. A beam of light consisting of red, green and blue colours is incident on a right angled prism. The refractive indices of the material of the prism for the above red, green and blue wavelength are 1.39, 1.44 and 1.47
respectively. The prism will