List two properties of the images formed by convex mirrors. Draw ray diagram in support of your answer.

Identify the device used as a spherical mirror or lens in following cases, when the image formed is virtual and erect in each case.Object is placed between infinity and device, image formed is diminished and between pole and focus, behind it.

Draw ray diagrams showing the image formation by a concave lens when an object is placed:
Beyond twice the focal length of the lens.

Your eye contains a convex lens. Why is it unwise to look at the sun?

Show the lateral displacement of the ray on the diagram.

List four precautions which a student should observe while determining the focal length of a given convex lens by obtaining image of a distant object on a screen.

At what distance from a converging lens of focal length 12cm must an object be placed in order that an image of magnification 1 will be produced?

Draw diagram to represent the action of a concave mirror on a beam of parallel light rays. Mark on this diagram principal axis, focus F, centre of curvature C, pole P and focal length ƒ, of the concave mirror.

An object is placed just outside the principal focus of concave mirror. Draw a ray diagram to show how the image is formed, and describe its size, position and nature.

An object is placed well outside the principal focus of a convex lens. Draw a ray diagram to show how.