Advertisements
Advertisements
प्रश्न
Name the spherical mirror which can produce a real and diminished image of an object.
Advertisements
उत्तर
Only a concave mirror can produce a real and diminished image of an object.
संबंधित प्रश्न
One half of a convex lens of focal length 10 cm is covered with a black paper. Can such a lens produce an image of a complete object placed at a distance of 30 cm from the lens? Draw a ray diagram to justify your answer. A 4 cm tall object is placed perpendicular to its principal axis of a convex lens of focal length 20 cm. The distance of the object from the lens is 15 cm. Find the nature, position and the size of the image.
Explain the following term related to spherical lenses:- optical centre
Match the items given in Column I with one or more items of Column II.
| Column I | Column II | ||
| (a) | A plane mirror | (i) | Used as a magnifying glass. |
| (b) | A convex mirror | (ii) | Can form image of objects spread over a large area. |
| (c) | A convex lens | (iii) | Used by dentists to see enlarged image of teeth. |
| (d) | A concave mirror | (iv) | The image is always inverted and magnified. |
| (e) | A concave lens | (v) | The image is erect and of the same size as the object. |
| (vi) | The image is erect and smaller in size than the object. |
What is a virtual image?
Define the Focal length of a spherical mirror
A ray of light is incident normally on a plane mirror. What will be 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?
A 50 cm tall object is at a very large distance from a diverging lens. A virtual, erect and diminished image of the object is formed at a distance of 20 cm in front of the lens. How much is the focal length of the lens?
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.
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
Write two more characteristics of the image.
Discuss the position and nature of image formed by a concave mirror when an object is moved from infinity towards the pole of mirror.
Discuss the position and nature of image formed by a convex mirror when an object is moved from infinity towards the pole of mirror.
Write the spherical mirror's formula and explain the meaning of each symbol used in it.
An object 5 cm high is placed at a distance 60 cm in front of a concave mirror of focal length 10 cm. Find the position and size of the image.
Answer the following question:
Distinguish between the convex mirror and the concave mirror.
Define the following term in relation to concave mirror.
Pole
Define the term Aperture.
Draw a ray diagram to show that a convex mirror has a wider field of view.
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.
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
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?
What is the difference between virtual images of an object formed by a concave mirror and a convex mirror?
The image formed in a plane mirror is always inverted.
In the figure shown, the image of a real object is formed at the point I. AB is the principal axis of the mirror. The mirror must be:
