A-Level physics wave

How stationary waves form?

Superposition of the two progressive waves.

Describe the differences between stationary and progressive waves?

Progressive waves energy will be transferred away. Stationary waves energy stored in the waves.

Give two example of transverse waves.

Light and earthquake S waves.

Give two example of longitudinal waves.

Sound and earthquake P waves.

What is the refractive index of air?

1

State the conditions for total internal reflection?

Angle of incidence is greater than the critical angle.

How modal can be avoided in optic fibre?

Make core as thin as possible.

How material dispersion are avoided in optic fibre?

Use a monochromatic source in the infrared part of the spectrum.