The Effects of Wavelength and Speed on Electromagnetic Waves

The video explores electromagnetic waves and their interactions at boundaries between different media. It covers reflection and refraction, explaining how waves change direction and speed. The video also discusses how wavelength and wave speed are affected by medium changes, with examples of light dispersion in prisms. It concludes with real-world applications of wave transmission, absorption, and reflection, such as in window panes and brick walls.

What happens to an electromagnetic wave when it reflects at a boundary?

• It remains unchanged.

• It changes both speed and direction.

• It changes direction but not speed.

• It changes speed but not direction.

Which variable remains constant when a wave crosses a boundary?

• Wavelength

• Wave speed

• Amplitude

• Frequency

Why does blue light refract more than red light when crossing a boundary?

• Blue light has a longer wavelength.

• Blue light has a shorter wavelength.

• Red light travels faster in glass.

• Red light is absorbed more.

How can a prism be used to split light into different colors?

• By reflecting all colors equally.

• By absorbing certain colors.

• By refracting different wavelengths at different angles.

• By transmitting all colors without change.

What happens to UV light when it hits a window pane?

• It is mostly transmitted.

• It is mostly absorbed or reflected.

• It is converted to visible light.

• It passes through unchanged.

Why can radio waves pass through brick walls while visible light cannot?

• Visible light travels faster than radio waves.

• Radio waves have a shorter wavelength.

• Radio waves have a longer wavelength.

• Visible light is not absorbed by the wall.

What is the primary reason visible light cannot pass through brick walls?

• It is too fast to pass through.

• It is absorbed by the wall.

• It is reflected by the wall.

• It interacts with the particles in the wall.