GCSE Physics - Refraction of waves #63

The video tutorial explains the concept of refraction, where light waves change direction when passing from one medium to another due to differences in density. It covers how to draw ray diagrams, showing the path of light as it enters and exits a medium like glass. The tutorial also discusses the relationship between wave speed, frequency, and wavelength, emphasizing that frequency remains constant while wavelength changes. Finally, it explores how different wavelengths of light are refracted by varying amounts, leading to dispersion in a triangular prism, creating a rainbow effect.

What happens to the speed of light when it moves from air into glass?

• It stops completely.

• It remains the same.

• It slows down.

• It speeds up.

When light enters a denser medium at an angle, in which direction does it bend?

• Parallel to the surface.

• It does not bend.

• Towards the normal.

• Away from the normal.

What is the first step in drawing a ray diagram for refraction?

• Draw the normal at the point of incidence.

• Draw the refracted ray.

• Draw the emergent ray.

• Draw the angle of refraction.

How does light behave when it passes from glass to air?

• It stops bending.

• It continues in a straight line.

• It bends away from the normal.

• It bends towards the normal.

What changes when the speed of a wave increases as it moves between mediums?

• The wavelength decreases.

• The frequency increases.

• The wavelength increases.

• The frequency decreases.