Questions

[1 Mark Question Answer]

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14 questions · timed · auto-graded

Question 11 Mark
Define plane mirror.
Answer
A plane mirror is a smooth or highly polished surface that reflects light in order to form an image
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Question 21 Mark
Define real and virtual images.
Answer
A real image is formed by the actual intersection of light rays whereas a virtual image is formed by the imaginary intersection of light rays.
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Question 31 Mark
State the laws of reflection.
Answer
The law of reflection states that the incident ray, the reflected ray, and the normal to the surface of the mirror all lie in the same plane. Furthermore, the angle of reflection is equal to the angle of incidence. A light ray incident upon a reflective surface will be reflected at an angle equal to the incident angle
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Question 41 Mark
What is meant by reflection ?
Answer
The bouncing back of light into the same medium after striking a surface is called reflection.
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Question 51 Mark
Reflected ray
Answer
The ray of light that is sent back after reflection by the mirror is called the reflected ray.
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Question 71 Mark
Normal
Answer
The perpendicular line drawn from, the point of incidence to the plane of reflecting surface is called normal.
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Question 81 Mark
Angle of reflection
Answer
The angle between reflected ray and the normal at the point of incidence to a reflecting surface is known as angle of reflection.
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Question 91 Mark
Angle of incidence
Answer
The angle formed between the normal and the incident ray at the point of incidence is called the angle of incidence.
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Question 101 Mark
Write the correct statement :
In periscope, the mirror surfaces are arranged perpendicular to each other.
Answer
In periscope, the mirror surfaces are arranged 45 to each other.
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Question 111 Mark
Write the correct statement :
Images in mirrors are formed by regular reflection.
Answer
Images in mirrors are formed by diffused reflection.
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Question 121 Mark
Write the correct statement :
Regular reflection is caused by the irregularities in the reflecting surface.
Answer
Regular reflection is caused by the regularities in the reflecting surface.
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Question 131 Mark
Write the correct statement :
Virtual image can be obtained on a screen.
Answer
Real image can be obtained on a screen.
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Question 141 Mark
Write the correct statement :
The ray of light after striking the mirror moves in same direction.
Answer
The ray of light after striking the mirror moves in different direction.
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[1 Mark Question Answer] - PHYSICS STD 8 Questions - Vidyadip