(a) Maxwell provides compelling theoretical evidence that light is a transverse wave.
(b) Thomas Young experimentally proved the wave behavior of light and Huygens assumption.
(c) Christiaan Huygens, a contemporary of Newton, established the wave theory of light by assuming that light waves were transverse.
(d) All the statements given above correctly answer the question “what is light”.
Answer: (a) Maxwell provides compelling theoretical evidence that light is a transverse wave.
(b) Thomas Young conducted his double slit experiment and tried to prove the wave nature of light by proving that light undergoes interference which is a phenomenon shown by waves. He never proved the type of wave light is transverse or longitudinal. [Option b is wrong]
(c) In Huygen’s principle the wave theory was established by assuming that the waves were longitudinal. [Option c is wrong]
(d) These statements mostly highlight the wave nature of light. They do not comment on the particle nature of light or the dual nature of light established. Hence, they clearly do not answer the question “what is light” correctly. [Option d is wrong]