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प्रश्न
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उत्तर
Two observations that prove that light travels in a straight line are:-
(a). Sunlight coming through a hole in a dark room, we can easily see that light travels in a straight line
(b). The light coming from laser light, used for presentation, can also be seen to travel in a straight line.
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संबंधित प्रश्न
What is meant by lateral inversion of an image in a plane mirror ? Explain it with the help of a diagram.
A light ray is incident normally on a plane mirror. (a) What is its angle of incidence?
Draw a diagram to show the reflection of a ray of light using a plane mirror. In the diagram, label the incident ray, the reflected ray, the normal, the angle of incidence and the angle of reflection.
State three ways in which the image formed in a plane mirror differs from the image formed in a pin hole camera.
An object 1.5 cm high when placed in front of a concave. the mirror produces a virtual image 3 cm high. If the object is placed at a distance of 6 cm from the pole of the mirror, calculate:
- the position of the image
- the focal length of the mirror.
A boy is standing in front of a plane mirror at a distance of 3 m from it.
(i) What is the distance between the boy and his image?
(ii) If the boy moves 1 m backward, find the distance between the image and the boy.
Complete the ray diagram to show the image observed by the eye after reflection in the following figure.
Dull materials reflect light.
State whether true or false. If false, correct the statement.
The reason for brilliance of diamonds is total internal reflection of light.
