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प्रश्न
How will you differentiate between a convex and a concave lens by looking at a distant object.
उत्तर
On seeing a distant object through the lens, if its inverted image is seen, then the lens is convex, and if the upright image is seen, then the lens is concave.
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संबंधित प्रश्न
The diagram below shows a lens as a combination of a glass slab and two prisms.
- Name the lens formed by the combination.
- What is the line XX’ called?
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- The final emergent ray either meets XX’ at a point or appears to come from a point on XX’. Label it as F. What is this point called?
Study the diagram shown in Fig. 5.56
Complete the diagram to show the formation of image A’B’ of the object AB of same size.
Study the diagram shown in the following Figure.
Name the lens LL’ and draw its outline.
A ray of light incident at the optical centre of lens, passes undeviated after refraction.
What type of lenses are used in spectacles worn by an old lady for knitting?
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Make the rrect choices in the following items :
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A lens used as a magnifying glass
(i) ls a diverging lens
(ii) Produces a virtual image
(iii) ls placed with the object nearer the lens than the principle focus
Name the subjective property of light related to its wavelength.
When does a ray of light falling on a lens pass through it undeviated?
