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NCAT - Practice Test - Physics - Dawn of Modern Physics - Quiz 7

Practice 10 high yield MCQs on Physics from Chapter Dawn of Modern Physics for Practice Test. After submission, get instant results with correct answers and detailed explanations. This is Quiz 7 of the series.

61. The Lorentz factor γ is defined as:



62. The momentum of a photon is given by p = E/c. This relation is derived from:



63. The number of photons emitted per second by a 100 W monochromatic light source of wavelength 500 nm is about:



64. The dual nature of light is best demonstrated by:



65. The velocity of an electron in the first Bohr orbit is about 2.18×10⁶ m/s. Its de Broglie wavelength is about:



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Instructions: Select one answer per question. After submitting, you will see your score, correct answers, and explanations.

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