What is the term for light that oscillates in one direction?

• A. Unpolarized light
• B. Monochromatic light
• C. Polarized light
• D. Dichroic light

Answer: (C)

The term that describes light oscillating in one direction is polarized light. Polarization refers to the orientation of the light waves; in polarized light, the electric field oscillates along a specific plane, rather than in multiple directions as seen in unpolarized light.

Understanding the context is important: when light is unpolarized, it consists of waves vibrating in all possible angles perpendicular to the direction of propagation. Monochromatic light refers to light of a single wavelength, and dichroic light describes light that has different absorption properties when passing through materials, leading to different colors depending on the angle of incidence or the wavelength. These terms do not capture the specific characteristic of oscillation directionality that defines polarized light.