Waves Mid-Term recap

Multiple Choice

The speed of a sound wave depends on

• the frequency
• the medium
• both air temperature and medium
• the air temperature

Multiple Choice

What fundamental rules govern how all waves travel, bend, and carry energy?

• The Wave Equation (v = fλ)

• Diffraction

• Refraction & Wavefronts

Multiple Choice

What happens to the wave when the gap is similar in size to the wavelength?

• The wave spreads out significantly

• The wave remains unchanged

• The wave is completely blocked

• The wave reflects back

Multiple Choice

A cannon produces a loud bang and a flash of light. A sailor 500 m away measures a time difference of 1.6 seconds between seeing the flash and hearing the bang. Calculate the speed of sound.

• 312.5 m/s

• 310 m/s

• 500 m/s

• 1.6 s

Open Ended

How does light bend, split, and reflect to enable technologies like fibre optics and create natural phenomena like rainbows?

Multiple Choice

Which is true about the speed of radio waves compared to light waves? They are...

• less energy & frequency, but still the SAME speed as the speed of light (300,000,000 m/s)

• less energy & frequency, so LESS than the speed of light (300,000,000 m/s)

• smaller wavelength, so LESS than the speed of light (300,000,000 m/s)

• more energy & frequency, so MORE than the speed of light (300,000,000 m/s)

Multiple Choice

A ray of light shines on the surface of oil (n=1.47). The angle x is 56°. Calculate the value of the angle of refraction.

• 34°

• 22°

• 56°

• 90°

Open Ended

Describe and explain what happens to the ray as it strikes side AC.

Multiple Choice

Which medium has the smaller index of refraction?

• Material 1

• Material 2

• The index is the same in both materials

Multiple Choice

What material could the upper layer be?

• Water

• Boron Nitrate

• Cubic Zirconia

• Diamond

Multiple Choice

What material could the lower layer be?

• air

• water

• Boron Nitrate

• Diamond

Multiple Choice

_____ cables transmit beams of light without allowing any of the light to escape until it gets to the end of the cable.

• Ethernet

• Fiber optic

• Armored

• Coaxial

Multiple Choice

What happens to light during total internal reflection?

• The angle of incidence is greater than the critical angle.

• The angle of reflection is the same as the critical angle.

• The angle of refraction is less than the critical angle.

• The angle of incidence is zero.

Multiple Choice

Based on the picture, If the wavelength is 3.9cm, and it takes 0.66 seconds to complete one full wavelength. What is the wave speed? (pay attention to units)

• 0.072 m/s

• 0.059 m/s

• 0.048 m/s

• 0.026 m/s