Q30 of 58 Page 1

A student obtained a sharp image of a candle flame placed at the distant end of the laboratory table on a screen using a concave mirror to determine its focal length. The teacher suggested him to focus a distant building about 1km far from the laboratory, for getting more correct value of the focal length. In order to focus the distant building on the same screen the student should slightly move the

To focus the distant building which is 1km from the laboratory which means for the given concave mirror, the object (building) is at infinity, and to obtain the sharp image, the student should move the screen towards the mirror. Hence (c) option

More from this chapter

All 58 →
28

A student has to perform the experiment "To identify the different parts of an embryo of a dicot seed." Select from the following an appropriate group of seeds:

 29

Which of the following is a correct set of homologous organs?

 31

To determine the approximate focal length of the given convex lens by focussing a distant object (say, a sign board), you try to focus the image of the object on a screen. The image you obtain on the screen is always:

 32

Select from the following the best experimental set-up for tracing the path of a ray of light passing through a rectangular glass slab: