Transverse waves have oscillations perpendicular to the direction of energy transfer (propagation). Longitudinal waves have oscillations parallel to the direction of energy transfer (propagation), like sound waves in air. Light is non-mechanical; it does not require a medium to travel.
Light waves are
Asked in UPSC CISF AC EXE 2021 · Topic: Optics (Wave Nature of Light: Huygens' Principle)
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