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What is the relationship between velocity of light and refractive index?
Important Questions on Space Communication
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A transmitting antenna at the top of a tower has a height and the height of the receiving antenna is . What is the maximum distance between them for satisfactory communication in line of sight (LOS) mode?

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List | List | ||
(a) | height over earth's surface | (i) | Thermosphere |
(b) | height over earth's surface | (ii) | Mesosphere |
(c) | height over earth's surface | (iii) | Stratosphere |
(d) | height over earth's surface | (iv) | Troposphere |

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