A-Level physics wave

Answer with definition.

Where is the angle of incidence/refraction. [1 mark]

Between ray and the normal.

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.

Give the best description for the type of graph:

Pattern and graph for a single slit diffraction for monochromatic light.

This is the graph for a single slit diffraction for white light.

Describe colour of the pattern from left to right.

Red to Violet, White light, Violet to Red.

What if transparent prisms B reflective index is higher than A.

State the change of the path and explain your answer. [2 marks]

The ray bend toward the normal.

As the angle of refraction will be smaller than 43 due to snell law.