Practice Sheets on Light Reflection & Refraction

Light reflection and refraction Worksheet-22

1. When a ray of light is incident normally on a surface separating two different optical mediums (having different refractive indices), then the transmitted ray suffers _____

A. deviation in its path                B. no deviation its path

C. Lateral displacement              D. Angular deviation

2. When a ray of light traveling in a optically rarer medium is incident obliquely on the surface of another optically denser medium, a ____ portion of light is reflected back into the same medium and _____ portion of light gets transmitted into the other medium.

A. Small, large                              B. Large, small

Light reflection and refraction Worksheet-23

11. Absolute refractive index of vacuum is taken as

A. More than unity                       B. Less than unity

C. Exact unity                                D. Infinity

12. When two optical media are compared, the one with _____ refractive index is termed optically ____.

A. higher, denser

B. lower, denser

C. higher, rarer

Light reflection and refraction Worksheet-24

21. The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?

A. between the focus and centre of curvature

B. at the centre of curvature

C. beyond the centre of curvature

D. between the pole of the mirror and focus

22. Where should an object be placed in front of a convex lens to get a real image of the size of the object

A. At the principal focus of the lens

B. At twice the focal length