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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
You are standing at a distance of 2 meters from a plane mirror.
What is the distance between you and your image?
Why are infinite images not seen when two plane mirrors are facing each other?
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 converging mirror, forms three times magnified virtual image when an object is placed at a distance of 8 cm from it. Calculate:
- the position of the image
- the focal length of the mirror.
An object OA is placed on the principal axis of a concave mirror as shown in the figure. Copy and complete the diagram to show the formation of image.
Complete the path of incident ray in the following case.
Differentiate between a reflection and a shadow
Match the following:
| 1. | Vegetable oil | a. | Transparent |
| 2. | Glass | b. | Translucent |
| 3. | Wood | c. | Waterproof |
| 4. | Aluminum foil | d. | Opaque |
What is Translucent objects? Give an example.
You can see a rainbow only when your back is towards the sun.
