Question

True or False questions

3.The speed of an electromagnetic wave is the ratio of the magnitude the magnetic field to the electric field at point in time as the wave travels through space.

4. The speed of an electromagnetic wave is the ratio of the magnitude the magnetic field to the electric field at point in time as the wave travels through space.

7.Total Internal Reflection occurs when light passes from a more optically dense medium to a less optically dense medium at an angle so great that there is no refracted ray

9. An object 2 cm high is 30 cm in front of a concave mirror. The radius of curvature of the mirror is 20 cm. Student A determined that the image distance is 15 cm. Student A’s assessment is:

Answer 1

Multiple questions posted, so answering only the first question:

3. For electromagnetic waves, c=E/B, where c is speed of electromagnetic wave, E is magnitude of electric field, B is magnitude of magnetic field.

So, speed of electromagnetic wave is ratio of magnitude of electric field to magnitude of magnetic field.

Hence given statement is false as it says, speed of electromagnetic wave is ratio of magnitude of magnetic field to magnitude of electric field.