List of top Physics Questions on Light

A thin prism has an angle of \(8^{\circ}\) and a minimum deviation of \(6^{\circ}\). Find the speed of light in the prism.
A convex lens of refractive index 1.5 has radii of curvature +20 cm and $-$20 cm. The focal length of the lens is:
In Young’s double-slit experiment, the slit separation is 0.4 mm and the screen is 2 m away. If light of wavelength 600 nm is used, the fringe width is:
In Young’s double-slit experiment, the wavelength of light is doubled while all other parameters remain unchanged. The fringe width becomes:
The focal length of objective lens is \(50cm\), focal length of eyepiece is \(5cm\), tube length is \(15cm\) and least distance of distinct vision is \(25cm\). Find the magnifying power of the microscope.
The refractive index of the material of a prism is \(n=1.6\). Find the ratio of the angle of the prism to the angle of minimum deviation.
A lens of power \(5\,D\) forms a virtual image having magnification \(2.5\). Find the position of the object.
Two polaroids are inclined at an angle of \(30^\circ\). Unpolarized light of intensity \(40\,W\,m^{-2}\) is incident on the first polaroid. Find the intensity after emerging from the second polaroid.
Distance between two slits is \(2\,mm\), distance between slit and screen is \(1.6\,m\), and wavelength of light is \(500\,nm\). Find the fringe width.
The powers of the objective lens and eyepiece of an astronomical telescope are \(2D\) and \(20D\) respectively. Find the length of the telescope in normal adjustment.
When light enters a different medium, its wavelength changes because:
Which colour of the light has the longest wavelength?