SSC MCQ Question Ans. Light for Sight

SSC MCQ Question Ans. Light for Sight. The necessity of light is unlimited in our daily life. If we close our eyes we cannot see anything. Again in a completely dark place, we cannot see anything in spite of opening our eyes. Light is that cause, with the help of which we can see. You have been acquainted with the different phenomena of light at the junior secondary level. In this chapter, other than the uses of mirrors, you will know more about the refraction of light. Moreover, you will know about the functions of eyes, the least distance of distinct vision, the power of the lens, a defect of vision and uses of the lens and the way of keeping eyes normal.

SSC MCQ Question Ans. Light for Sight

You have seen the refraction of light and its real application in class eight. We know that in a transparent homogeneous medium light always travels in a straight line. When a ray of the light incident not perpendicularly but obliquely from one transparent medium to another transparent medium the direction of the ray changes at the surface of separation of the two media. The phenomenon of this change in direction of a ray is called the refraction of light.

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