Waves at a Boundary: Refraction, Reflection, and Transmission

The video tutorial explains how waves behave when they encounter boundaries between different media. It covers the changes in wave speed, wavelength, and direction, while frequency remains constant. The tutorial delves into refraction, where waves bend towards or away from the normal depending on speed changes. It also discusses wave fronts and their role in direction changes, as well as reflection, where waves bounce back into the original medium. Finally, it explores wave transmission and absorption, highlighting how energy is transferred or passed through media.

What remains unchanged when a wave crosses the boundary between two different media?

• Amplitude

• Wave speed

• Wavelength

• Frequency

What is the phenomenon called when a wave changes direction as it crosses a boundary at an angle?

• Reflection

• Diffraction

• Refraction

• Interference

When a wave slows down as it crosses into a new medium, how does it bend?

• Perpendicular to the boundary

• Parallel to the boundary

• Towards the normal

• Away from the normal

What happens to the wave fronts when they cross a boundary between two media?

• They remain unchanged

• They slow down uniformly

• They speed up uniformly

• One side speeds up or slows down before the other

What is the law of reflection?

• The angle of incidence is equal to the angle of reflection

• The angle of incidence is less than the angle of reflection

• The angle of incidence is unrelated to the angle of reflection

• The angle of incidence is greater than the angle of reflection

What happens to a wave when it is absorbed by a medium?

• It speeds up

• It is reflected back

• It bends towards the normal

• It disappears as energy is transferred to the medium

If a wave is transmitted through a medium without being absorbed or reflected, what happens?

• It changes direction

• It disappears

• It continues traveling through the medium

• It bends towards the normal