Light PHYSICS - Light

Which mirror is used in periscope?

Looking into a mirror one finds her image diminished, the mirror is :

In case of concave mirror, the minimum distance between an object and its real image is :

If an incident ray passes through the centre of curvature of a spherical mirror, the reflected ray will:

A ray of light is incident on a concave mirror. If it is parallel to principal axis, the reflected ray will:

An object OA is placed on the principal axis of a concave mirror as shown in the figure. Copy and complete the diagram to show the formation of image.

(a) What do you understand by the term real image?
(b) What type of mirror is used to obtain a real image?
(c) Does the mirror named by your form real image for all locations? Give reason for your answer.
(d) Is real image always inverted?

State four uses of a plane mirror.

Why are infinite images not seen when two plane mirrors are facing each other?

State the laws of reflection.

Copy the figure and complete it, by drawing two rays to show the formation of the image of the object AB . State the size, position and nature of image formed.

In the figure is shown a concave mirror. A is a point on the principal axis. If an object O is kept at A, image is formed on A itself. Copy the diagram. Draw the image in the diagram. Is the image real or virtual?

Measure the distance PA and write it in the diagram. What is the distance PA called? Mark a point B on the principal axis, at which, if a point source of light is kept, the rays travel parallel to principal axis after reflection from M. What is point B called?

1. What is a real image?
2. What type of mirror is used to obtain a real image-of an object?
3. Does the mirror named by you above give real images for all locations of object?

1. Why does a driver use a convex mirror as a rear view mirror?
2. Illustrate your answer with the help of ray diagram.

Compare the characteristics of an image formed by a convex mirror and a concave mirror, when object is beyond centre of curvature, but not at infinity.

Define the following terms in relation to concave mirror.
1. Pole
2. Centre of curvature
3. Principal axis
4. Principal focus
5. Focal length
6. Radius of curvature
7. Aperture

An object 5 cm high forms a virtual image of 1.25 cm high, when placed in front of a convex mirror at a distance of 24 cm . Calculate:
1. the position of the image
2. the focal length of the convex mirror.

A converging mirror, forms a three times magnified virtual image when an object is placed at a distance of 8 cm from it. Calculate:
1. the position of the image
2. the focal length of the mirror.

An object 1.5 cm high when placed in front of a concave . mirror, produces a virtual image 3 cm high. If the object is placed at a distance of 6 cm from the pole of the mirror, calculate:
1. the position of the image
2. the focal length of the mirror.