Science
Which of the following lenses would you prefer to use while reading small letters found in a dictionary?
- A convex lens of focal length 50 cm
- A concave lens of focal length 50 cm
- A convex lens of focal length 5 cm
- A concave lens of focal length 5 cm
Related Questions
A spherical mirror and a thin spherical lens have a focal length of -15 cm. The mirror and the lens are likely to be
- both concave
- both convex
- the mirror is concave, and the lens is convex
- the mirror is convex, but the lens is concave
No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be
- only plane
- only concave
- only convex
- either plane or convex
We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.
Name the type of mirror used in the following situations.
(a) Headlights of a car
(b) Side/rear-view mirror of a vehicle
(c) Solar furnace
Support your answer with a reason.