Advertisements
Advertisements
प्रश्न
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
Advertisements
उत्तर
Spectacles for the correction of short sight
A diverging lens is used in spectacles to correct short-sightedness.
APPEARS IN
संबंधित प्रश्न
A ray of light is incident on a plane mirror at an angle of 30°. What is the angle of reflection
What is the name of the phenomenon in which the right side of an object appears to be the left side of the image in a plane mirror?
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
What is the nature of spherical mirror?
Which are the two convenient rays that are chosen to construct the image by a spherical mirror for a given object? Explain with the help of suitable ray diagrams.
Draw a ray diagram to show the formation of image by a concave mirror for the object beyond its centre of curvature. State three characteristics of the image.
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.
An object forms a virtual image which is 1/8th of the size of the object. If the object is placed at a distance of 40 cm from the convex mirror, calculate:
- the position of the image
- the focal length of the convex mirror.
Define the following term:
concave mirror
What is the relationship between the focal length and radius of curvature?
Define the term Focus of a concave mirror.
Define the term Normal.
The spherical mirror with a reflecting surface curved inward is called
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
Size of image of an object by a mirror having a focal length of 20 cm is observed to be reduced to 1/3rd of its size. At what distance the object has been placed from the mirror? What is the nature of the image and the mirror?
A spherical mirror whose reflecting surface is curved outwards is called ______ mirror.
The image formed in a plane mirror is always inverted.
