Q31 of 40 Page 1

A student obtains a blurred image of a distant object on a screen using a convex lens. To obtain a distinct image on the screen he should move the lens

The position of object is not known whether it is at infinity or beyond centre of curvature or at centre of curvature of lens. So depending upon the position of object we have to move the lens away or towards the screen.

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29

The following vegetables are kept in a basket:

Potato, Tomato, Radish, Brinjal, Carrot, Bottle-gourd


Which two of these vegetables correctly represent the homologous structures?

 30

Study the given ray diagrams and select the correct statement from the following:

 32

A student very cautiously traces the path of a ray through a glass slab for different values of the angle of incidence (i). He then measures the corresponding values of the angle of refraction (r) and the angle of emergence (e) for every value of the angle of incidence. On analysing these measurements of angles, his conclusion would be

 33

Study the following ray diagram:


In this diagram, the angle of incidence, the angle of emergence and the angle of deviation respectively have been represented by