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WorksheetsRAY OPTICS
Total questions: 10
Worksheet time: 5mins
Consider an extended object immersed in water contained in a plane trough. When seen from close to the edge of the trough the object looks distorted. Which of the following is not correct.
The apparent depth of the points close to the edge are nearer the surface of the water compared to the points away from the edge.
The angle subtended by the image of the object at the eye is smaller than the actual angle subtended by the object in air.
Some of the points of the object far away from the edge may not be visible because of total internal reflection.
Water in a trough acts as a lens and magnifies the object.
Critical angle and refractive index are:
Directly related
Equal
Inversely related
None of these
A point source of light is placed in front of a plane mirror.
All the reflected rays meet at a point when produced backward.
Only the reflected rays close to the normal meet at a point when produced backward
Only the reflected rays making a small angle with the mirror, meet at a point when produced backward
Light of different colours make different images
Mark the correct options:
If the incident rays are converging, we have a real object.
If the final rays are converging, we have a real image.
The image of a virtual object is called a virtual image.
If the image is virtual, the corresponding object is called a virtual object.
An object is placed at a distance of 0.5 m in front of a plane mirror. The distance between object and image will be:
0.25 m
0.5 m
1.0 m
2.0 m
For a total internal reflection, which of the following is correct?
Light travels from rarer to denser medium.
Light travels from denser to rarer medium.
Light travels in air only.
Light travels in water only.
Mirage is a phenomenon due to:
Refraction of light
Reflection of light
Total internal reflection of light
Diffraction of light
You are given four sources of light each one providing a light of a single colour – red, blue, green and yellow. Suppose the angle of refraction for a beam of yellow light corresponding to a particular angle of incidence at the interface of two media is 90°. Which of the following statements is correct if the source of yellow light is replaced with that of other lights without changing the angle of incidence?
The beam of red light would undergo total internal reflection.
The beam of red light would bend towards normal while it gets refracted through the second medium.
The beam of blue light would undergo total internal reflection.
The beam of green light would bend away from the normal as it gets refracted through the second medium.
The optical density of turpentine is higher than that of water while its mass density is lower. Figure shows a layer of turpentine floating over water in a container. For which one of the four rays incident on turpentine in figure the path shown is correct?
1
2
3
4
An object of height 1 cm is kept at a distance of 40 cm from a concave spherical surface (R = 20 cm) separating air and glass (μ = 1.33). The location of the image formed is:
- 32 cm
+ 16 cm
-18 cm
+ 26 cm
