Question

Which of the following are true for sinusoidal radiation?

The radiation pattern does not change with distance.

The radiation travels perpendicular to the electric field.

Oscillating charges are not accelerating.

The electric field and the magnetic field have the same magnitude at the same point in space.

The radiation pattern does not change with time.

The radiation travels perpendicular to the magnetic field.

The electric field is perpendicular to the magnetic field.

The propagation direction of the radiation can be determined from the right hand rule.

The source of the radiation is oscillating charges.

Answer 1

Sinusoidal radiation is characterized by the radiation traveling perpendicular to the electric and magnetic fields, as well as the electric and magnetic fields being perpendicular to each other. The direction of propagation can be determined using the right hand rule.

Step-by-step explanation:

The correct statements for sinusoidal radiation are:

1. The radiation travels perpendicular to the electric field
2. The radiation travels perpendicular to the magnetic field
3. The electric field is perpendicular to the magnetic field
4. The propagation direction of the radiation can be determined from the right hand rule
5. The source of the radiation is oscillating charges

These statements are supported by the properties of electromagnetic waves. The electric and magnetic fields of an electromagnetic wave are perpendicular to each other and also perpendicular to the direction of propagation. The wave is created by oscillating charges and its direction of propagation can be determined using the right hand rule.

Answer 2

Sinusoidal electromagnetic radiation has a consistent pattern over time, travels perpendicular to magnetic fields, and is produced by oscillating charges.

Step-by-step explanation:

Considering sinusoidal electromagnetic radiation, several characteristics define its behavior and properties. An important attribute is that the radiation pattern does not change with time, indicating the stability of its waveform during propagation. The second true statement is that the radiation travels perpendicular to the magnetic field, which is a fundamental aspect of the transverse nature of electromagnetic waves. Lastly, oscillating charges are the source of the radiation, as these accelerating charges are what produce the electromagnetic waves. However, some statements are false, such as the idea that the electric field and magnetic field have the same magnitude at the same point in space; in reality, their strengths are related by the constant speed of light ℓ (µ), where the ratio of electric field strength to magnetic field strength (E/B) is equal to c. Additionally, the electric field is indeed perpendicular to the magnetic field in electromagnetic waves, and the propagation direction can be determined using the right-hand rule.