What is the focal power of a spherical mirror or a lens? What may be the reason for using $P = \frac{1}{f}$ as its expression?

Important Questions on Optics

EASY

11th Maharashtra Board

IMPORTANT

Physics>Chapter 9 - Optics>Exercises>Q 2

Explain the spherical aberrations for spherical mirrors. How can it be minimised? Can it be eliminated by some curved mirrors?

EASY

11th Maharashtra Board

IMPORTANT

Physics>Chapter 9 - Optics>Exercises>Q 2

Under what conditions is total internal reflection possible? Explain it with a suitable example. Define critical angle of incidence and obtain an expression for it.

MEDIUM

11th Maharashtra Board

IMPORTANT

Physics>Chapter 9 - Optics>Exercises>Q 2

Describe construction and working of optical fibre. What are the advantages of optical fibres communication over electronic communication?

MEDIUM

11th Maharashtra Board

IMPORTANT

Physics>Chapter 9 - Optics>Exercises>Q 2

A spherical surface separates two transparent media. Derive the expression that relates object and image distances with the radius of curvature for a point object. Clearly, state the assumptions, if any.

HARD

11th Maharashtra Board

IMPORTANT

Physics>Chapter 9 - Optics>Exercises>Q 2

Derive the len's maker equation. Why is it called so? Under which conditions focal length f and radii of curvature R are numerically equal for a lens?

EASY

11th Maharashtra Board

IMPORTANT

Physics>Chapter 9 - Optics>Exercises>Q 2

What are different types of dispersions of light? Why do they occur?

MEDIUM

11th Maharashtra Board

IMPORTANT

Physics>Chapter 9 - Optics>Exercises>Q 2

Define angular dispersion for a prism. Obtain its expression for a thin prism. Relate it with the refractive indices of the material of the prism for corresponding colours.

HARD

11th Maharashtra Board

IMPORTANT

Physics>Chapter 9 - Optics>Exercises>Q 2

Explain and define the dispersive power of a transparent material. Obtain its expressions in terms of angles of deviation and refractive indices.