(1) Write about artificial food colours, the substances used in them a

1.	(1) Write about artificial food colours, the substances used in them and theirharmful effects.(2) Aniket from Std. X uses spectacles. The power of the lenses in his spectacleis - 0.5 D.Answer the following questions:(a) State the type of lenses used in his spectacles.(b) Name the defect of vision Aniket is suffering from.(c) Find the focal length of the lenses used in his spectacles.
Answer» If student is suffering from an eye defect and uses a lens of power -0.5D, then he is suffering from the defect of vision called myopia. The nature of lens used to correct this defect is concave lens. Let’s find out the focal length of the lens. Power = 1/ focal length= -0.5 =1/f On simplifying we will get, f = -2 m. PLEASE HIT THE LIKE BUTTON

(1) Write about artificial food colours, the substances used in them and theirharmful effects.(2) Aniket from Std. X uses spectacles. The power of the lenses in his spectacleis - 0.5 D.Answer the following questions:(a) State the type of lenses used in his spectacles.(b) Name the defect of vision Aniket is suffering from.(c) Find the focal length of the lenses used in his spectacles.

Answer»

If student is suffering from an eye defect and uses a lens of power -0.5D, then he is suffering from the defect of vision called myopia.

The nature of lens used to correct this defect is concave lens.

Let’s find out the focal length of the lens.

Power = 1/ focal length= -0.5

=1/f

On simplifying we will get,

f = -2 m.

PLEASE HIT THE LIKE BUTTON

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