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प्रश्न
The diverging lens in part (a) is replaced by a converging lens also of focal length 100 mm. The object remains in the same position and an image is formed by the converging lens. Compare two properties of this image with those of the image formed by the diverging lens in part (a).
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उत्तर
| S.No | Image formed by a diverging lens | Image formed by a converging lens |
| 1 | Image formed is virtual and erect | Image formed is real and inverted |
| 2 | Image is smaller in size than the object | Image is larger in size than the object |
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संबंधित प्रश्न
Explain the following term related to spherical lenses: focal length
Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.
Name the spherical mirror which has:
(a) virtual principal focus.
(b) real principal focus.
Name the two types of spherical mirrors. What type of mirror is represented by the:
front side of a shining steel spoon?
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.
Why is a hole burnt in the carbon paper?
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?
Define the following terms in the context of spherical mirrors :
(i) Pole
(ii) Centre of curvature
(iii) Radius of curvature
(iv) Principal axis
Write the spherical mirror's formula and explain the meaning of each symbol used in it.
Upto what maximum distance from the pole the image in a convex mirror can be obtained? what will be the location of object then ?
Select the correct option:
Which mirror is used in periscope?
Define the following term:
spherical mirror
Define the following term in relation to concave mirror.
Radius of curvature
Define the term principal focus in case of convex mirror. Draw a convex mirror and show its principal focus and focal length clearly.
What do you understand by the term real image?
AB is the object, A'B' is the image, and MM' is the position of the mirror. Complete the ray diagram showing the formation of the image and find the focal length of the mirror.
Draw a ray diagram to show that a convex mirror has a wider field of view.
Assertion: Incident ray is directed towards the centre of curvature of spherical mirror. After reflection it retraces its path.
Reason: Angle of incidence (i) = Angle of reflection (r) = 0°
Spherical mirrors are one form of ______ mirrors.
Visit a nearby hospital. You can also visit the clinic of an ENT specialist, or a dentist. Request the doctor to show you the mirrors used for examining ear, nose, throat and teeth. Can you recognise the kind of mirror used in these instruments?
