Question

In which of the following media can non-mechanical waves travel?
(A). In vacuum as well as in a medium
(B). In vacuum but not in a medium
(C). In a medium but not in a vacuum
(D). Neither in a medium nor in vacuum

Answer 1

- Hint: The conceptual questions like this are so simple to answer but you should have the knowledge of the basic concepts, the definitions, and also the properties of non-mechanical waves.

Complete step-by-step solution -

Since we know that Non-mechanical waves are waves that do not require a medium for transfer of their energy for example Electromagnetic waves.
A physicist called James Clerk Maxwell developed the idea of electromagnetic waves, and he established a theory for the detection of electromagnetic waves. He discovered electrical fields, and magnetic fields would pair together to form electromagnetic waves. He condensed the magnetism-electricity interaction into what is today called "Maxwell's Equations."
These electromagnetic waves differ from mechanical waves because they do not require a propagating medium. This means electromagnetic waves can travel not only through the air and solid objects but also through space vacuum.
Hence, A is the correct option.

Note: In the above sentence we found a word wave that is so relevant to this problem and that can be described as a wave is a disruption (change from equilibrium) of one or more fields, so that the field values continuously oscillate around a stable equilibrium value. When the relative amplitude of oscillation stays constant at various locations in the region, the wave is considered to be a standing wave. If the relative amplitude in the field varies at different stages, it is assumed that the wave is a traveling wave. Waves may only occur in fields when there is a force that helps to restore equilibrium to the field.