Ever wondered how camera capture a moment ? When you click the shutter, an image is refracted on to a light sensitive surface, giving a snapshot of your birthday property.
1. What kind of lens is used in camera?
a. Convex lens
b. Plane lens
c. Concave lens
d. None of these
2. The lens in the camera produces a ____ image.
a. Real and erect
b. Virtual and erect
c. Real and inverted
d. Virtual and inverted
3. The power of concave lens is negative and convex lens is _____
a. Positive
b. Negative
4. The light rays which falling on a convex lens will converge at a point called
a. Centre of curvature
b. Radius of curvature
c. Optical centre
d. Focus
5. A convex lens has a focal length of 10 cm. At what distance from the lens should the object be placed so that it forms a real and inverted image 40 cm away from the lens?
a. 10 cm
b. 20 cm
c. 30 cm
d. 40 cm
