AIIMS 2019 Physics Optics Revision Quiz 1 for NEET & AIIMS Exams

Question 1

For Bragg’s diffraction by a crystal to occur, then the X-ray of wavelength

and interatomic distance d must be

Question 2

Direction: Each of these questions contains two statements. Assertion and Reason Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.

Assertion (A): The relation between u, v and f for the spherical mirror is valid only for mirrors whose sizes are very small compared to their radii of curvature.
Reason (R): The laws of reflection are strictly valid for plane surfaces but not for large spherical surfaces.

Question 3

A simple telescope, consisting of an objective of focal length 60 cm and a single eye lens of focal length 5 cm is focused on a distant object in such a way that parallel rays emerge from the eye lens. If the object makes an angle of 2 º at the objective, then the angular width of the image is

Question 4

Direction: In each of the following questions, a Statement of assertion is given followed by a corresponding Statement of reason.

Assertion (A) The focal length of lens does not change, when red light is replaced by blue light.
Reason (R) The focal length of lens does not depends on colour of light used.

Question 5

Direction: In each of the Following questions, two statements are given. One is assertion and the other is reason. Examine the statement carefully and mark the correct answer according to the instruction given below

Assertion Crystalline solids can cause X-rays to diffract.
Reason Interatomic distance in crystalline solids is of the order of 0.1 nm.

Question 6

A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that the end closer to the pole is 20 cm away from it. Find the length of the image.

Question 7

A source of light lies on the angle bisector of two plane mirrors inclined at angle θ. The values of θ, so that the light reflected from one mirror does not reach the other mirror will be

Question 8

The near point and far point of a person are 40 cm and 250 cm respectively. Determine the power of the lens he/she should use while reading a book kept at distance 25 cm from the eye.