Optics PYQ

In Young's double slit experiment, the fringe width is β. If the wavelength of light is doubled and the slit separation is halved, the new fringe width is:

The thin lens formula is:

The critical angle for total internal reflection from a medium to air is 30°...

In a single slit diffraction pattern the angular width of the central maximum is 0.1 rad...

In Youngs double slit experiment, fringe width is proportional to

A thin prism of angle 6° and refractive index 1.5 is combined with another prism of angle 4° and refractive index 1.75...

The focal length of a convex lens is 10 cm. Its power is:

A convex lens of focal length 20 cm forms an image...

The refractive index of a medium where speed of light is 2 × 10⁸ m/s is:

In Youngs double slit experiment the fringe width is β...