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What is a magnifying glass? Which lens is used to make a magnifying glass?

Important Questions on Light

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Which of the following lens would you prefer to use while reading small letters found in a dictionary?
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The image formed by a convex lens is inverted, magnified and real, when an object is kept between the lens and the focus.
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Explain the working of an astronomical telescope using refraction of light.
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Which type of lens is used to make fire with during day time?
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A convex lens usually magnifies images.
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Give reasons for the following.
Lemons kept in a glass of water appear enlarged.
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Draw a ray diagram when the object is placed between optical center and principal focus of a convex lens.
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A lens forms a magnified, erect and virtual image when an object is placed very close to it. Identify the lens.
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Look at the ray diagrams given below. State, whether the images formed, will be real or virtual.

Question Image

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List the properties of image formed by a convex lens.
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State the position and nature of the image formed by a convex lens for the following position of the object:

Between O and F

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At what position of the object does a convex lens act as a magnifying glass?
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Give reasons for the following:
Convex lens is used in a magnifying glass.

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A girl sees a magnified image of a closely kept object by holding a simple, clear glass device in her hand. This device is likely to be a
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State three characteristics of the image formed by a convex lens when the object is close to it.

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Which of the following can produce a virtual image?
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Cotyledons are also called-
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The image formed by a convex lens is real, inverted and magnified when an object is kept between the lens and the focus.
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Draw a ray diagram for the formation of an image by a convex lens when the object is placed very near to it.
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When does a convex lens form a virtual image? Is the virtual image bigger or smaller than the object?