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प्रश्न
A parallel, oblique beam of light falls on a concave lens. Draw a diagram to show refraction of light through the lens.
उत्तर
The concave lens in the accompanying diagram is refracting a parallel, oblique beam of light.
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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 converging lens is used to produce an image of an object on a screen,object on a screen. What change is needed for the image to be formed nearer to the lens?
(a) increase the focal length of the lens
(b) insert a diverging lens between the lens and the screen
(c) increase the distance of the object from the lens
(d) move the object closer to the lens
Draw a diagram to show how a converging lens focusses parallel rays of light?
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.
Give the position, size and nature of image of formed by a concave lens when the object is placed:
at infinity.
A beam of light is incident through the holes on one side of a box and emerges out through the holes on its opposite side as shown in the following figure:
The box contains:
(a) a glass prism
(b) a concave lens
(c) a convex lens
(d) a parallel-sided glass slab
A concave lens of 20 cm focal length forms an image 15 cm from the lens. Compute the object distance.
At what distance from a concave lens of focal length 20 cm a 6 cm tall object be placed so as to obtain its image at 15 cm from the lens? Also calculate the size of the image formed.
Draw a ray diagram to justify your answer for the above situation and label it.
Convex magnifying glass is called divergent magnifying glass and concave magnifying glass is called converging magnifying glass.
In a reading glass what is the position of the object with respect to the concave lens used?
