Advertisements
Advertisements
Questions
State one practical use of a concave mirror.
Advertisements
Solution
- Concave mirrors are used in reflecting microscopes.
- Concave mirrors are used in shaving.
- Concave mirrors are used in makeup glasses.
- Concave mirrors are used in an ophthalmoscope.
Notes
Students should refer to the answer according to their questions.
RELATED QUESTIONS
A student focused the Sun rays using an optical device 'X' on a screen S as shown.
From this it may be concluded that the device 'X' is a (select the correct option)
(A) Convex lens of focal length 10 cm.
(B) Convex lens of radius of curvature 20 cm.
(C) Convex lens of focal length 20 cm.
(D) Concave mirror of focal length 20 cm.
Explain the following term related to spherical lenses:- principal axis
Explain the following term related to spherical lenses:- principal focus
An image that cannot be obtained on a screen is called ______.
A virtual image larger than the object can be produced by a ______.
Name the two types of spherical mirrors. What type of mirror is represented by the:
- back side of a shining steel spoon?
- front side of a shining steel spoon?
Name the spherical mirror which can produce a real and diminished image of an object.
The shiny outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror:
- What will be the focal length of this mirror?
- Which type of spherical mirror will it provide?
- State whether this spherical mirror will diverge or converge light rays.
A concave lens produces an image 20 cm from the lens of an object placed 30 cm from the lens. The focal length of the lens is:
(a) 50 cm
(b) 40 cm
(c) 60 cm
(d) 30 cm
What is a spherical mirror?
Explain the meaning of the terms focus and focal length in case of a convex mirror, with the help of suitable ray diagram.
Does the mirror mentioned in part (b) form real image for all locations of the object?
(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).
A concave mirror forms a real image of an object placed in front of it at a distance 30 cm, of size three times the size of object. Find
- the focal length of mirror
- position of image.
When an object of height 1 cm is kept at a distance 4 cm from a concave mirror, its erect image of height 1.5 cm is formed at a distance 6 cm behind the mirror. Find the focal length of mirror, by drawing.
A point light source is kept in front of a convex mirror at a distance of 40 cm. The focal length of the mirror is 40 cm. Find the position of image.
Does the mirror name by your form a real image for all locations? Give a reason for your answer.
Define linear magnification produced by a mirror?
Find the height of the image of a body of height 1.5m in a mirror with a magnification of 1.5.
The boxes in figure (a, b, c) represent mirrors; insert a mirror which will reflect the incident ray as shown in the diagram.
Define the term Pole.
Which of the following has curved reflecting surface?
Define focal length.
A student traces the path of a ray of light passing through a rectangular slab.
 |
 |
 |
 |
For measuring the angle of incidence, he must position the protractor in the manner shown in the figure:
The distance from the center of curvature of the mirror to the pole is called the focal length of the mirror.
