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Ask QuestionPosted by Parmod Hooda 6 years, 3 months ago
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Posted by Parmod Hooda 6 years, 3 months ago
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Sia ? 6 years, 3 months ago
When a ray of light is incident on a rectangular glass slab, it gets refracted. After the refraction it comes out from glass slab. It gets a interface of a glass and the air (another medium). So it deviates away from normal. Since, the glass slab is rectangular and both sides of the glass slab have the same medium. The light refracts in such a way that incident and emergent rays are parallel.
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Sia ? 6 years, 3 months ago
To
The Manager,
Rampur Sugar Factory,
Rampur
Dear Sir,
Our school plans to visit your factory and make our students get first hand knowledge of its working.
We, about 100 students in our school, intend visiting your sugar factory to see its working. Our two teachers will accompany us.
I request you to kindly give us permission to visit your factory. You will appreciate the need for this visit and grant us the permission. Please let us know the day and time of the visit.
Yours faithfully
Ramesh
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| All the naturally occurring substances of metals which are present in the earth’s crust are known as Minerals. | Ores are usually used to extract metals economically. A large amount of metals are present. |
| All Minerals are not ores. | All ores are minerals. |
| Minerals are native form in which metals exist. | Ores are mineral deposits. |
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Sajid Ali 6 years, 3 months ago
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