The equation expressing the correlation between refractive index and wavelength of light is (a) μ = A + B/λ (b) μ = A + Bλ² (c) μ = Aλ + B (d) μ = A + B/λ²

At what angle must a light ray fall on the surface of an equilateral prism so that its angle of minimum deviation will be 20°? OR Calculate the time required by a ray of light to traverse a glass slab of thickness 2 mm. The refractive index of glass=1.5.

If a reflected ray from a concave mirror makes an angle of 45° with the normal, the angle of incidence will be 90° 22.5° 135° 45°

Where is the image formed if the object is placed in between f and 2f of a convex lens ?

State whether the refractive index of a medium would increase or decrease if the angle of incidence is increased.

Which parameter remains unaltered during refraction of light? (a) Velocity (b) Amplitude (c) Frequency (d) Wavelength

Draw refracted rays for the incident rays which are parallel to the principal axis of a convex lens. Mark focus (F). [3] OR Explain the converging action of a convex lens. [3]

A light is incident from air medium on another medium. If the refractive index of this medium is 1.5 and the wavelength of light in this medium is 4000 Å what is the wavelength of light in the air medium ? What is the velocity of the light in this medium? [3] OR As a result of refraction of light through an equilateral prism the angle of deviation becomes 40°. If the path of the ray through the prism is parallel to the base of the prism, determine the angle of incidence at the first surface of prism. [3]

Define dispersion of light. How would you identify monochromatic light and composite light with the help of a prism? [1 + 2]

Write down the relationship between relative refractive index and absolute refractive index. On which factors does the relative refractive index of a medium depend? [1 + 2] OR Show that if a monochromatic light ray passes symmetrically through an equilateral prism then the angle of deviation of that ray will be minimum

Whether a concave lens is called a converging or diverging lens? Answer with reason.

A ray parallel to the principal axis of a concave mirror follows which path after reflection by the concave mirror?