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प्रश्न
Draw images in case of a concave lens when the object is at infinity.
उत्तर
When the object is at infinity, the incident ray is taken parallel to the principal axis. As shown in the figure, the image is virtual and is formed at the focus F1 It is diminished (small) in size.
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संबंधित प्रश्न
List some things that concave lens and concave mirror have in common.
Fill in the following blank with suitable word:
A convex lens .................. rays of light, whereas a concave lens .................. rays of light.
Which type of lens is
a diverging lens? Explain your answer with diagrams.
The power of a concave lens is 10 D and that of a convex lens is 6 D. When these two lenses are placed in contact with each other, the power of their combination will be :
(a) +16 D
(b) +4 D
(c) −16 D
(d) −4 D
An object is placed on the axis of a lens. An image is formed by refraction in the lens. For all positions of the object on the axis of the lens, the positions of the image are always always between the lens and the object Draw a ray diagram to show it.
The power of a lens is negative. State whether it is convex or concave.
In figure give below of thin concave lens, F1 and F2 are its foci, complete the path of the given ray of light after it emerges out of the lens.
Distinguish between Concave lens and Convex Lens.
Distinguish between:
Concave Lens and Convex Lens
The focal length of a lens is negative. In this case, state the kind of lens.
