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प्रश्न
A ray of light is going towards the focus of a concave lens. draw a ray diagram to show the path of this ray of light after refraction through the lens.
उत्तर
A ray of light passing through the focus of a concave lens will become parallel to the principal axis after refraction.
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संबंधित प्रश्न
If the image formed by a lens for all positions of an object placed in front of it is always erect and diminished, what is the nature of this lens? Draw a ray diagram to justify your answer.
A small bulb is placed at the focal point of a converging lens. When the bulb is switched on, the lens produces:
(a) a convergent beam of light
(b) a divergent beam of light
(c) a parallel beam of light
(d) a patch of coloured light
Construct ray diagrams to illustrate the formation of a virtual image using a converging lens,
A person cannot see distant objects clearly. His vision can be corrected by using the spectacles containing:
(a) concave lenses
(b) plane lenses
(c) contact lenses
(d) convex lenses
The following diagram in given below shows an object OA and its virtual image IB formed by a lens.
A concave lens forms a magnified or diminished image depending on the distance of an object from it.
State two applications of a concave lens.
Choose the correct alternative and rewrite the following:
Inside water, an air bubble behaves ....................
An object is placed in front of a lens between its optical centre and focus. The formed image is virtual, erect, and diminished. Name the lens used.
Give two characteristics of the image formed by a concave lens.
