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प्रश्न
Convex magnifying glass is called divergent magnifying glass and concave magnifying glass is called converging magnifying glass.
पर्याय
Right
Wrong
उत्तर
Convex magnifying glass is called divergent magnifying glass and concave magnifying glass is called converging magnifying glass- Wrong
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संबंधित प्रश्न
State whether concave lens has a real focus or a virtual focus.
List some things that concave lens and concave mirror have in common.
If the image formed by a lens is always diminished and erect, what is the nature of the lens?
What type of image is always made by a concave lens?
An object is placed 10 cm from a lens of focal length 5 cm. Draw the ray diagrams to show the formation of image if the lens is diverging.
What is the difference between the two images formed above?
An object is placed at a distance of 4 cm from a concave lens of focal length 12 cm. Fine the position and nature of the image.
Calculate the image distance for an object of height 12 mm at a distance of 0.20 m from a concave lens of focal length 0.30 m, and state the nature and size of the image.
An object is 2 m from a lens which forms an erect image one-fourth (exactly) the size of the object. Determine the focal length of the lens. What type of lens is this?
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
What type of lens is used to correct
myopia?
Out of the two lenses, one concave and the other convex, state which one will show the divergent action on a light beam. Draw diagrams to illustrate your answer.
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.State three characteristics of the image.
An object of height 4 cm is kept at a distance of 30 cm from a concave lens. Use lens formula to determine the image distance, nature and size of the image formed if focal length of the lens is 15 cm.
If the image formed by a lens is diminished in size and erect, for all positions of the object, what type of lens is it?
Express power of a concave lens of focal length 50 cm with its sign.
A concave lens has a focal length 30 cm. Find the position and magnification (m) of the image for an object placed in front of it at distance 30 cm. State whether the image is real or virtual?
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.
Define the term principal foci as applied to a concave lens. Illustrate your answer with the aid of proper diagrams. Show the focal length of the lens in the diagram.
