Physics 27-11-24

What is wave interference and how does it occur?

• Wave interference occurs only with sound waves in the air.

• Wave interference is the result of waves colliding and disappearing completely.

• Wave interference is the phenomenon that occurs when two or more waves superimpose to form a resultant wave.

• Wave interference is the process of waves being absorbed by a medium.

Explain the difference between constructive and destructive interference.

• Constructive interference has no effect on amplitude; destructive interference increases amplitude.

• Constructive interference occurs only in waves; destructive interference is irrelevant to waves.

• Constructive interference increases amplitude; destructive interference decreases or cancels amplitude.

• Constructive interference creates sound; destructive interference only affects light.

What are sound waves and how do they propagate?

• Sound waves are mechanical vibrations that propagate through a medium as longitudinal waves.

• Sound waves can only travel through solids and not through liquids or gases.

• Sound waves are static vibrations that do not require a medium to propagate.

• Sound waves are electromagnetic waves that travel through space.

Describe the characteristics of sound waves in different mediums.

• Sound waves travel at the same speed in all mediums.

• Sound waves travel fastest in gases, slower in solids, and slowest in liquids.

• Sound waves do not travel in solids at all.

• Sound waves travel fastest in solids, slower in liquids, and slowest in gases.

How can we demonstrate light polarization using filters?

• Using a single filter to block all light completely.

• Light polarization can be demonstrated by using two polarizing filters, observing the changes in light intensity as one filter is rotated.

• Demonstrating polarization by shining light through a prism.

• Observing the color changes in light without any filters.

What is the Doppler effect and how does it relate to sound waves?

• The Doppler effect is the change in amplitude of sound waves due to temperature variations.

• The Doppler effect only occurs with light waves and has no relation to sound.

• The Doppler effect is the reflection of sound waves off surfaces, causing echoes.

• The Doppler effect is the change in frequency of sound waves due to the relative motion between the source and the observer.

How does the Doppler shift affect the frequency of a moving sound source?

• The frequency is only affected by the medium through which the sound travels.

• The frequency increases as the source approaches and decreases as it recedes.

• The frequency decreases as the source approaches and increases as it recedes.

• The frequency remains constant regardless of the source's motion.

Discuss the relationship between wave speed, frequency, and wavelength.

• Wave speed is inversely proportional to frequency and directly proportional to wavelength.

• Wave speed is directly proportional to frequency and inversely proportional to wavelength.

• Wave speed decreases as frequency increases.

• Wave speed is independent of both frequency and wavelength.

Which wave properties change when light passes from air into glass?

• colour and speed

• frequency and wavelength

• speed and wavelength

• wavelength and colour

Diffraction is the name given to the

• addition of two coherent waves to produce a stationary wave pattern

• bending of waves round an obstacle.

• change of direction when waves cross the boundary between one medium and another.

• splitting of white light into colours.