Ray Optics

In the figure shown here, what is the equivalent focal length of the combination of lenses (Assume that all layers are thin)?

Which set of colours will come out in air for a situation shown in figure?

For the given incident ray as shown in the figure, the condition of the total internal reflection of this ray and the minimum refractive index of prism will be:

A point object is placed at a distance of $60\mathrm{cm}$ from a convex lens of focal length $30\mathrm{cm}$. If a plane mirror were put perpendicular to the principal axis of the lens and at a distance of…

A beam of light consisting of red, green and blue colours is incident on a right-angled prism. The refractive index of the material of the prism for the above red, green and blue wavelengths are $1.39$,$1.44$and $1.47$…

Find the value of the angle of emergence from the prism. Refractive index of the glass is $\sqrt{3}$?

A small coin is resting on the bottom of a beaker filled with liquid. A ray of light from the coin travels upto the surface of the liquid and moves along its surface. How fast is the light travelling in the liquid?

The refracting angle of a prism is $A$ , and refractive index of the material of the prism is $\cot\,\left(\frac{A}{2}\right)$. The angle of minimum deviation is

An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of

Match the corresponding entries of column 1 with column 2. [Where m is the magnification produced by the mirror] Column 1 Column 2 (A) $m=-2$ (a) Convex mirror (B) $m=-\frac{1}{2}$ (b) Concave mirror (C) $m=+2$ (c) Real…

When one light ray is reflected from a plane mirror with $30^{\circ}$ angle of reflection, the angle of deviation of the ray after reflection is:

A green light is incident from the water to the air - water interface at the critical angle $\left(\theta\,_{c}\right)$.Select the correct statement?