Physics
Sun appears red in colour at sunrise and sunset due to

Red light having longer wave length scatters away
The fact that sun emits only red colour at that time
That all other colours scatter away except red
That sun comes out of the mountains

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Physics
Which of the following events occurred first ?

Albert Einstein propounded the General Theory of Relativity
Madame Marie Curie became the first woman Nobel Prize winner
Marconi first tranmitted a wireless signal
Max Planck unveiled the Quantum Theory

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