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प्रश्न
In the following diagram , the object and the image formed by the respective lenses are shown. Complete the ray diagram, and locate the focus. Find the focal length of the lens.
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उत्तर
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संबंधित प्रश्न
What is a lens?
In the diagram below, XX’ represents the principal axis, O the optical centre and F the focus of the lens. Complete the path of rays A and B as they emerge out of the lens.
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| (a) | (b) |
A ray of light incident parallel to the principal axis of a lens, passes undeviated after refraction.
State the condition of the following:
A lens has both its focal lengths equal.
State the condition of the following:
A ray passes undeviated through the lens.
What type of lenses are used in spectacles worn by an old lady for knitting?
Make the correct choices in the following items :
The image formed by a diverging lens, shown in fig, , is
Define the term focus of a lens.
How will you differentiate between a convex and a concave lens by looking at a printed page?
Draw a ray diagram to show the image formed by a convex lens when the object is placed between F and 2F.
