List of top Physics Questions on Optics asked in Bihar Board XII

What is equivalent lens? Derive an expression for equivalent focal length of two lenses of focal lengths \(f_1\) and \(f_2\) kept at a distance \(d\).
What is photoelectric effect? What are the laws of photoelectric effect? Explain this law given by Einstein.
Write the necessary conditions for total internal reflection of light.
How does refractive index of any medium depend upon the wavelength of light?
A convex lens is dipped in a liquid, whose refractive index is equal to the refractive index of the material of the lens. Then its focal length will
The bubble of soap appears coloured due to
A person uses spectacles (lens) of +2D power. His defect of vision is.
If the critical angle for total internal reflection from any medium to vacuum is 30°, then the velocity of light in the medium is.
Convex lens is used in:
The colour of the sky is blue due to:
The image of any object formed at the retina of the human eye is:
A large virtual image of an object is formed by:
Powers of two lenses kept in contact are \( P_1 \) and \( P_2 \). The power of the equivalent lens will be:
The wavelength of which colour is minimum?
Which causes the formation of rainbow?
The image formed in a compound microscope is:
Draw graph between the angle of incidence and angle of deviation by using prism. Determine angle of minimum deviation (\(\delta_m\)).
Find the focal length of the given convex lens by plotting graph between u and v.
Plot the graph between \( \frac{1}{u} \) and \( \frac{1}{v} \) for the given concave mirror and then evaluate focal length by graph.
Observe polarization of light due to a thin slit.
Obtain a lens combination with the specified focal length using two lenses from the given lens.
Demonstrate dispersion of light after passing a white light through a prism.
Show formation of image (nature and size) by a convex lens with the help of a screen and candle.
Show lateral deviation of a beam of light incident obliquely on a glass slab.
Show the formation of image by a concave mirror using a candle and a screen.