List of top Physics Questions on Optics asked in PSEB XII

What is diffraction of light? Explain diffraction at a single slit and deduce the expression for the width of its central maxima.

Find the focal length of the combination of two thin lenses in contact.

Two lenses, one diverging of power 2D and the other converging of power 6D are combined together. Calculate the focal length and power of combination.

Diffraction of light is the phenomenon of bending of light around the corners of an aperture in its path. (T/F)

Hugen's wave theory allows us to know about:

Velocity of light is maximum in:

The distance of object needle is 45 cm from a lens which forms an image on the screen placed 90 cm on the other side. What is the type of lens? What is the focal length and the size of the image if the size of object needle is 5 cm?

What is total internal reflection? Write necessary conditions for it.

Power of a thick lens is smaller than the thin lens. (T/F)

Sustained interference is caused by the superposition of two waves coming from two coherent sources. (T/F)

Wave front due to light source situated at infinity is: