An object is placed at a distance of 15 cm from a convex lens of focal length 10 cm. Write the nature and magnification of the image.

An object 5 cm long is placed at a distance of 25 cm from a converging lens of focal length 10 cm. Find the position, size and nature of the image formed along with the ray diagram.

Cover the half of a convex lens with black paper. Will this lens be able to form a complete image of an object? Check your answer with the help of an experiment. Explain your observations.

Name the mirror used for the following situations : (a) Headlight of a car (b) Side mirror/ rear mirror of a vehicle (c) Solar furnace Explain your answers.

Using a concave mirror of focal length 15 cm, we want to form an erect image of an object. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image bigger or smaller than the object? Draw a ray diagram of the image formation for this case.

Which of the following lenses would you prefer while reading small letters in a dictionary? (a) A convex lens with focal length of 50 cm (b) A concave lens with focal length of 50 cm (c) A convex lens with focal length of 5 cm (d) A concave lens with focal length of 5 cm