Physics
The wave of theory of light is based on

The inverse square law
The laws of refraction
Huyghens' principle
The laws of reflection

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Physics
In the gamma decay of a nucleus

The mass number of the nucleus does not change whereas its atomic number changes
Neither the mass number nor the atomic number of the nucleus changes
The mass number of the nucleus changes whereas its atomic number does not change
Both the mass number and the atomic number of the nucleus change

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Physics
Stars twinkle because

the distance of the stars from the earth changes with time.
None of these
the intensity of light emitted by them changes with time.
the refractive index of the different layers of the earth's atmosphere ch

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