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प्रश्न
A ray of light incident on a lens parallel to its principal axis, after refraction passes through or appears to come from ______.
विकल्प
Its first focus
Its optical entre
Its second focus
The centre of curvature of its second surface
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उत्तर
A ray of light incident on a lens parallel to its principal axis, after refraction passes through or appears to come from its second focus.
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संबंधित प्रश्न
In the following figure (a) and (b), F1 and F2 are positions of the two foci of thin lenses. Draw the path taken by the light ray AB after it emerges from each lens.
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| (a) |
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| (b) |
Distinguish between a real and a virtual image.
Study the diagram shown in the following Figure.
Name the lens LL’ and draw its outline.
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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An object is placed 50 cm from a connverging lens of focal length 30 cm. The image produced would be
Define the term focus of a lens.
How will you differentiate between a convex and a concave lens by looking at a distant object.
Complete the following diagram and state what happens to the ray of light after refraction through the lens.
Draw a ray diagram to show the image formed by a convex lens when the object is placed between F and 2F.
