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Explain the following term related to spherical lenses:- centres of curvature
Explain the following term related to spherical lenses:- principal axis
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).
Name the kind of mirror used to obtain:
A real and diminished image.
The focal length of a concave mirror is 10 cm. Find its radius of curvature.
Answer the following question.
Write the modification in the curvature of the eye lens which enables us to see the nearby objects clearly?
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.
A student traces the path of a ray of light passing through a rectangular slab.
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For measuring the angle of incidence, he must position the protractor in the manner shown in the figure:
