Top 1000+ GK Questions and Answers Pdf - 1

Question: 1

Define radius of curvature?

Radius of curvature of a surface is the radius of the sphere of which the surface forms a part.

Question: 2

What are the two defects of the eye?

Short sight or myopia :

The ability to see the nearer objects and the inability to see distant objects clearly may arise in some of us. This defect is called short sight or myopia.

This defect can be rectified by using concave lens of suitable focal length.

Long sight or hypermetropia :

The ability to see distant objects and the inability to see nearer objects clearly may arise in some of us. This defect is called long sight. This defect can be rectified by using convex lens of suitable focal length.

Question: 3

Give the uses of simple microscope?

1. Watch repairers and finger print analysts use the convex lens as simple microscope.

2. It is used as reading lens.

Question: 4

State the laws of reflection?

(1) The incident ray, the reflected ray and the normal lie in the same plane.

(2) The angle of incidence is equal to the angle of reflection.

Question: 5

What is photosynthesis?

The process by which the green plants prepare their own food in the presence of sunlight, using chlorophyll is known as photosynthesis.

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