# The electromagnetic waves through a vacuum are described by:

- E(x,t) = E
_{m}sin(ωt – kx), and - B(x,t) = B
_{m}sin(ωt – kx) - then which relation is correct

**E**_{m }k = B_{m }ω- B
_{m }k = E_{m }ω - E
_{m }B_{m}= ω k - B
_{m }/ E_{m }= ω k

- E(x,t) = E
_{m}sin(ωt – kx), and - B(x,t) = B
_{m}sin(ωt – kx) - then which relation is correct

**E**_{m }k = B_{m }ω- B
_{m }k = E_{m }ω - E
_{m }B_{m}= ω k - B
_{m }/ E_{m }= ω k

- E × B
**E × H**- H × B
- A × (B × E)

- Nickel
- Cobalt
- Iron
**Copper**

**Attract each other**- Repel each other
- Do not effect
- None of the above

- Attract each other
**Repel each other**- Do not effect
- None of the above

**Zero**- ∞
- evB
- ILB