Physics
Which of the following occurred first ?

Max Planck unveiled the Quantum Theory
Wright Brothers successfully flew an aircraft
Guglielmo Marconi sent out the first wireless signals
Albert Einstein propounded the General Theory of Relativity

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Physics
Rainbows are produced when sunlight :

Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
None of the given statements is correct.
Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction

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