Velocity of light in vacuum is:
Correct answer: B. 3 x 10^5 Km sec-1
- A. Zero
- B. 3 x 10^5 Km sec-1
- C. 3 x 10^8 Km sec-1
- D. Infinite
Explanation
The velocity of light in a vacuum is 3 × 105 Km/sec. This is a constant speed at which light travels in a vacuum. Options A, C, and D are incorrect because they do not represent the actual speed of light in a vacuum.
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Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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