Sinusoidal Radiation: True or False?

[xzibition8612]

Homework Statement

Which of the following are true for sinusoidal radiation?

1)The radiation pattern does not change with distance.
2)The radiation travels perpendicular to the electric field.
3)Oscillating charges are not accelerating.
4)The electric field and the magnetic field have the same magnitude at the same point in space.
5)The radiation pattern does not change with time.
6)The radiation travels perpendicular to the magnetic field.
7)The electric field is perpendicular to the magnetic field.
8)The propagation direction of the radiation can be determined from the right hand rule.
9)The source of the radiation is oscillating charges.

The Attempt at a Solution

I chose (2), (4), (7), (8) and it was marked wrong. Is (9) correct?

 

[kuruman]

One of (2), (4), (7), (8) is not correct. Which one? Also, you missed a correct answer in one of (1), (3), (5), (6).

 

[xzibition8612]

(4), (6), (7), (8), (9)
These are the correct ones right?

 

[kuruman]

(4), (6), (7), (8), (9)
These are the correct ones right?

Why do you think each of them is correct?
Why do you think each of the other ones is incorrect?

 

[xzibition8612]

it's good thanks. The computer marked them right. Thanks again.

 

[kuhn2]

it's good thanks. The computer marked them right. Thanks again.

So was 4, 6, 7, 8, 9 correct?

 

[kuruman]

So was 4, 6, 7, 8, 9 correct?

What do you think and why? We just don't give answers in this forum.