Consider the following statements associated with an electromagnetic wave in free space:
- At every point in space, the electric field and th emagnetic vector field are perpendicular to each other and to the direction of propagation.
- Velocity of propagation of wave in free space is equal to
- oscillate in phase opposition and the ratio of their amplitude is constant being equal to
- Whatever may be the frequency , the electromagnetic wave travels in space with velocity of light.
Which of the above statements are correct?