Physics
Choose the most appropriate answer: In which atmospheric layer are the communication satellites located?

Stratosphere
Ionosphere
Troposphere
Mesosphere

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Physics
In total internal reflection, the light travel from

Rarer to denser medium and it occurs with loss of intensity
Denser to rarer medium and it occurs with no loss of intensity
Denser to rarer medium and it occurs with loss of intensity
Rarer to denser medium and it occurs with no loss of intensity

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