A slab of high quality flat glass, with ...

A slab of high quality flat glass, with parallel faces, is placed in the path of a parallel light beam before it is focussed to a spot by a lens. The glass is rotated slightly back and forth from the dotted centre about an axis coming out ofthe page, as shown in the diagram. According to ray optics the effect on the focussed spot is:

There is no movement of the spot

The spot moves towards then away from the lens

The spot moves up and down parallel to the lens

The spot moves along a line making an angle a (neither zero nor `90^(@)`)with axis of lens

Text Solution

Verified by Experts

Topper's Solved these Questions

GEOMETRICAL OPTICS
PHYSICS GALAXY - ASHISH ARORA|Exercise Numerical MCQs Single Options Correct|51 Videos
GEOMETRICAL OPTICS
PHYSICS GALAXY - ASHISH ARORA|Exercise Advance MCQs with One or More Options Correct|30 Videos
GEOMETRICAL OPTICS
PHYSICS GALAXY - ASHISH ARORA|Exercise Discussion Question|29 Videos
ELECTROSTATICS
PHYSICS GALAXY - ASHISH ARORA|Exercise Unsolved Numberical Problems|73 Videos
HEAT AND THERMAL EXPANSION
PHYSICS GALAXY - ASHISH ARORA|Exercise UNSOLVED NUMRICAL PROBLEMS FOR PREPARATION OF NSEP, INPhO & IPhO|82 Videos

Similar Questions

Explore conceptually related problems

A glass cube has side length a and its refractive index is mu = (3)/(2) . A ray of light (AB) is incident normally on one of its face and after passing through the cube it forms a spot S on screen sigma . The cube begins to rotate with angular speed omega about its central axis as shown in the Figure. Immediately after the cube begins to rotate, find the speed of the spot S on the screen.

Consider a light beam incident from air to a glass slab at Brewster's angle as shown in figure. A polaroid is placed in the path of the emergent ray at point P and rotated about an axis passing through the centre and pependicular to the plane of the plaroid.

Consider a light beam incident from air to a glass slab at Brewster's angle as shown in Figure. A polaroid is placed in the path of the emergent ray at point P and rotated an axis passing through the centre and perpendicular to the plane of the polaroid.

A beam of light composed of red and green ray is incident obliquely at a point on the face of rectangular glass slab. When coming out on the opposite parallel face, the red and green ray emerge form

A parallel beam of monochromatic light of wavelength 5900Å falls normally on a convex lens of diameter 10cm which focusses the light on a flat normal screen located at a distance of 20cm from the lens. What would be the radius of the central bright spot formed on the screen?

A thin bi-convex lens made out of a material of refractive index mu_(1) is place in a medium of refractive index mu_(2) . A paraxial beam of light, parallel to the principal axis of the lens, is shown in the figure. Based on the ray diagram, we can conclude that

Answer the following questions (a) In a single slit diffraction experiment, the width of the slit is made double the original width. How does this affect the size and intensity of the central diffraction band? (b) In what way is diffraction from each slit related to the interference pattern in a double-slit experiment? (c) When a tiny circular obstacle is placed in the path of light from a distant source, a bright spot is seen at the centre of the shadow of the obstacle. Explain why? (d) Two students are separated by a 7 m partition wall in a room 10 m high. If both light and sound waves can bend around obstacles, how is it that the students are unable to see each other even though they can converse easily (e) Ray optics is based on the assumption that light travels in a straight line. Diffraction effects (observed when light propagates through small apertures/slits or around small obstacles) disprove this assumption. Yet the ray optics assumption is so commonly used in understanding location and several other properties of images in optical instruments. What is the justification?

A ray of light travelling in air incident on a rectangular glass block and emerges out into the air from the opposite face. Draw a labelled ray diagram to show the complete path of this ray of light. Mark the two points where the refractions of light takes place. What can you say about the final direction of ray of light?

PHYSICS GALAXY - ASHISH ARORA-GEOMETRICAL OPTICS-Conceptual MCQs Single Option Correct

The position of a real point object and its point image are as shown i...
Text Solution
|
The image of the moon is produced bya convex lens of focal length f. T...
Text Solution
|
A converging lens of focal length 20cmand diameter5cmis cut along the ...
Text Solution
|
A man stands on a glass slab of height h and inside an elevator accele...
Text Solution
|
When an object is at a distance u(1) and u(2) from the optical centre ...
Text Solution
|
A liquid of refractive index 1.33 is placed between two identical plan...
Text Solution
|
Two particles A & B of mass m(1) and m(2) respectively start moving fr...
Text Solution
|
A mango tree is at the bank of a river and one of the branch of tree e...
Text Solution
|
A plane mirror having a mass m is tied to the free end of a mass less ...
Text Solution
|
An observer can see through a pin-hole the top end of a thin rod of he...
Text Solution
|
A ray of light is incident on the left vertical face of glass cube of ...
Text Solution
|
Two plane mirrors are inclined to each other at an angle theta. A ray ...
Text Solution
|
Two plane mirrors are inclined to each other such that a ray of light ...
Text Solution
|
A slab of high quality flat glass, with parallel faces, is placed in t...
Text Solution
|
A parallel glass slab of refractive index sqrt3 is placed in contact w...
Text Solution
|
The mirror of length L moves horizontally as shown in the figure with ...
Text Solution
|
Monochromatic light rays parallel to x-axis strike a convex lens AB of...
Text Solution
|
The focal length of convex tens is f and the distance of an object fro...
Text Solution
|
A light ray gets reflected from a pair of mutually | mirrors, not nece...
Text Solution
|
A ray is incident on the first prism at an angle of incidence 53^(@) a...
Text Solution
|