A line normal to the wavefront, showing the direction of the propagation of light is called the:
Correct answer: D. Ray of light
- A. Tangent
- B. Radius
- C. Wavelength
- D. Ray of light
Explanation
By definition, a light ray is a line (straight or curved) that is perpendicular to the light's wavefronts.
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About Optics
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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