## ACCELERATING EDUCATION

Physics keeps life going-物理 依据 生命

## Τρίτη, 18 Οκτωβρίου 2011

### Refraction of waves

The diagram below shows plane wavefronts incident on a boundary between two media

A and B.

The ratio

refractive index of medium B/ refractive index of medium A           is 1.4.

The angle between an incident wavefront and the normal to the boundary is 50

.
(ii) On the diagram above, construct three wavefronts to show the refraction of the

wave at the boundary.

(i) Calculate the angle between a refracted wavefront and the normal to the boundary.

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