Practice Exercise

Statement I- Due to diffused or irregular reflection of light, a closed room gets light even, if no direct sunlight falls inside the room.
Statement II- Irregular reflection, where the reflected rays are not parallel, does not follow the laws of reflection.

Optical fibers, though bent in any manner, allows light to pass through. What is the inference that one can draw from it?

Which one of the following statements is correct?

In the case of a compound microscope, which of the following statements is/are correct?
I. The focal length of the eyepiece is larger than the focal length of the objective.
II. The focal length of the eyepiece is smaller than the focal length of the objective.
III. The image produced in a normal optical microscope is real.
IV. The image produced in a normal optical microscope is virtual.
Select the correct answer using the codes given below

Which one of the following statements is not correct?

A lady is standing in front of a plane mirror at a distance of $1 \mathrm{m}$ from it. She walks $60 \mathrm{cm}$ towards the mirror. The distance of her image now from herself (ignoring the thickness of the mirror) is:

An object is placed at the centre of curvature of a concave mirror of focal length $16 \mathrm{cm}.$ If the object is shifted by $8 \mathrm{cm}$ towards the focus, then the nature of the image would be

A pencil is placed upright at a distance $10 \mathrm{cm}$ from a convex lens of focal length $15 \mathrm{cm}.$ The nature of the image of the pencil will be: