What characteristics prove that light is a longitudinal wave? Give two evidences that light travels in straight lines?
Force travels in a straight line in vacuum (or Ether). One evidence is that light beams from the sun or any source of light is seen to be straight. Experimentally, laser beams are found to travel straight for long distances, even to targets on the moon. A mirror placed on the moon by astronauts reflected the laser beam back to the observatory, and this has been recorded. Light is transverse wave. This means that the electromagnetic waves of light photons are transverse to the direction of propagation of light. It is NOT longitudinal, please. Light is polarized with magnetic poles in the Y axis. The pockets of energy during rectilinear propagation of light with sine transverse electromagnetic radiation are called photons.
Light is NOT a longitudinal wave. It is a transverse wave. Light can be polarised -only transverse waves can be polarised. Light travels in straight lines: a) Shadows are magnified images of an object; this is only possible if light travels in straight lines when the shadow is created. b) An object's physical position is the same as where it appears to be; if light didn't travel in straight lines, an object would not appear in its true position (e.g. it might appear to be on your left but it is actually on your right).
Light is a type of electromagnetic wave. Electromagnetic waves are transverse waves as they comprise electric and magnetic fields that oscillate at 90degree to each other. The best evidence that proves light travels in a straight line is by observing a car headlight switched on at night when it cuts a corner. It is visible that the beam of light is in a straight line and that another driver or a passenger will not attempt to cross the road due to the presence of the car.
