End Of Unit Questions Flashcards
What type of image is produced by a plane mirror?
Virtual
If you stand 1.5m in front of a plane mirror, where will your image be?
3m away from you
1.5 m to the mirror and 1.5 m away from mirror on other side
Which colour of light is refracted the most?
Violet
What is an echo?
The reflection of sound waves
What is a rarefaction?
The region in a longitudinal wave where the particles are further apart than in the rest position
What happens when light waves cross a boundary between two transparent substances?
Their speed changes
What is diffraction?
The spreading of a wave as it passes through a gap or around an obstacle
How does a flute produce sound?
The air in the flute vibrates as you blow across the mouthpiece
What does the pitch of a note depend on?
The frequency of the sound wave
What is the speed of a sound wave of frequency 330Hz and wavelength of 1cm?
3.3m/s
What is the frequency of a wave if it travels at 400m/s and it’s wavelength is 20m?
20Hz
What is the unit of wavelength?
Metres
