Question

what are the uses of lenses class 7 dont give googled answer

Answer 1

This is your answer is't

Answer 2

Answer:

The answer is:

Explanation:

There are two types of lenses:

⦿Convex lens

⦿Concave lens

⦿Convex lens:

                                              DEFINITION

•This lens converges a straight beam of light.

                                               WORKING

•This lens is thicker at the centre and gets thinner as we move towards the edges.                            

                                                    Uses

•The lens in the human eyes is the prime example. So the most common use of the lens is that it helps us to see.

•Another common example of the use of this type of lens is a magnifying glass. When an object is placed in front of it at a distance shorter than the focal length of the lens, it produces a magnified and erect image of the object on the same side as the object itself.

⦿Concave lens:

                                                   DEFINITION

•The point in the lens where the light refracts and diverges is known as the principal focus.

                                                    WORKING

•When an object is placed at infinity, a virtual image is formed at the focus. The size of the image is much smaller than that of the object.

                                                        Uses

•Used in Telescope

•Used in Eye Glasses

•Used in Peepholes

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