Advertisements
Advertisements
प्रश्न
Answer the following question:
Distinguish between the convex mirror and the concave mirror.
Advertisements
उत्तर
Convex mirror and concave mirror.
| Convex mirror | Concave mirror | |
| 1. | It is called a diverging mirror. | It is called a converging mirror. |
| 2. | The light is reflected from the outer surface. | The light is reflected from the inner surface. |
| 3. | It can form only a virtual image | It can form a real image as well as a virtual image. |
| 4. | According to sign convention, the focal length is positive. | According to sign convention, the focal length is negative. |
APPEARS IN
संबंधित प्रश्न
A simple microscope is used by watch repairers. Give reason.
Define Radius of curvature of the spherical mirror
A ray of light is incident normally on a plane mirror. What will be the
angle of reflection?
A diverging lens is used in:
(a) a magnifying glass
(b) a car to see objects on rear side
(c) spectacles for the correction of short sight
(d) a simple camera
A small object is placed 150 mm away from a diverging lens of focal length 100 mm.
(i) Copy the figure below and draw rays to show how an image is formed by the lens.
Figure
(ii) Calculate the distance of the image from the lens by using the lens formula.
Explain the following terms :
Pole, Centre of curvature, Radius of curvature, Principal axis. Show them on separate diagrams for each of the concave and convex mirrors.
What do you understand by the focus and focal length of a spherical mirror? Show them on the separate diagrams for each of a concave mirror and a convex mirror.
Name the kind of mirror used to obtain
(a) a real and enlarged image
(b) a virtual and enlarged image
(c) a real and diminished image, and
(d) a virtual and diminished image.
State the two convenient rays that are chosen to construct the image by a spherical mirror for a given object? Explain your answer with the help of suitable ray diagrams.
(a) When a concave mirror is used as a shaving mirror, where is the person's face in relation to the focus of mirror?
(b) State three characteristics of the image seen in part (a).
The sun is seen before the sunrise and after the sunset.
Define the following term in relation to concave mirror.
Pole
Define the following term in relation to concave mirror.
Center of curvature
Define the following term in relation to concave mirror.
Principal focus
An object is placed in front of a concave mirror as shown in the following figure. By scale drawing, find the nature of the image. Given f = 10 cm, v = 30 cm.
The spherical mirror used in a beauty parlour as make-up mirror is _______.
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
