Physics
A man standing at the top of a tower has two spheres A and B. He drops sphere A downwards and throws sphere B horizontally at the same time. Which of the following is correct ?

B will reach the ground first.
Both the spheres will reach the ground simultaneously.
The question is incomplete because the masses of the spheres are not given.
A will reach the ground first.

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Physics
In total internal reflection, the light travel from

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

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