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WorksheetsP12,13,14 Wave properties, EM waves and Light Retrieval Quiz KAH
Total questions: 51
Worksheet time: 30mins
Define a longitudinal wave.
One in which oscillations are perpendicular to the direction of energy transfer
One in which energy transfer occurs in direction of travel of wave
One in which oscillations are parallel to the direction of energy tranfer
One in which energy transfer is perpendicular to direction of travel of wave
Give 2 examples of a transverse wave:
Sound
Electromagnetic waves
Ripples on water
P wave (in an earthquake).
Give 2 examples of a longitudinal wave.
Sound
Electromagnetic Waves
P-Wave (in an earthquake)
S-Wave (in an earthquake)
What are two key features of a longitudinal wave?
Compression
Rarefaction
Node
Displacement
Define the amplitude of a wave.
Maximum displacement of a position the wave from its undisturbed position
A vector defining the movement of a point on the wave away from its undisturbed position
The distance between two identical points on the wave
The number of complete cycles per second
Define the wavelength of a wave.
Maximum displacement of a position the wave from its undisturbed position
A vector defining the movement of a point on the wave away from its undisturbed position
The distance from a point on one wave to the equivalent point on the adjacent wave
The number of complete cycles per second
Define the frequency of a wave.
Maximum displacement of a position the wave from its undisturbed position
A vector defining the movement of a point on the wave away from its undisturbed position
The distance from a point on one wave to the equivalent point on the adjacent wave
The number of complete cycles per second passing a point
What unit is frequency measured in?
Hz
W
f
s
What property of a wave always stays the same when it travels from one medium to another?
amplitude
wavelength
frequency
power
What rule do waves follow when they reflect off a surface?
angle of incidence = angle of refraction
angle of incidence = angle of reflection
Snell's Law
What happens when waves are transmitted at a boundary between two substances? (select 2)
The frequency changes
The speed changes
The direction sometimes changes
When waves are absorbed by a substance, what happens?
The energy of the wave is lost
The energy of the wave is transferred to the energy stores of the substance
The energy of the wave continues through the substance
Electromagnetic Waves are:
Longitudinal
Transverse
What feature of EM waves means they cannot be mechanical waves?
They are transverse
They can travel through a vacuum
They have a large range of frequencies
What do EM waves transfer?
Matter
Colour
Energy
Mass
Which EM wave comes between Radio and Infrared in the spectrum?
Ultraviolet
Visible Light
Microwave
Gamma
Which part of the EM spectrum is most commonly responsible for skin cancer?
Visible
Infrared
Ultraviolet
Gamma
How are gamma rays produced?
Radioactive decay
Oscillations in an electric circuit
Superman's eyes
Heating element in a toaster
How are radio waves produced?
Radioactive decay
Oscillations in an electric circuit
Superman's eyes
Heating element in a toaster
2 uses of radio waves are...?
Television transmission
Cooking
Treating cancer
Bluetooth signals
2 uses of microwaves are...?
Cooking food
Satellite communication
Irradiating food to kill bacteria
Remote controllers for TVs etc
2 uses of infrared radiation are...?
Heating
Remote controls
Irradiating food to kill bacteria
Satellite communication
Which types of EM waves are harmful to the human body?
Radio
Visible
Ultraviolet
X-rays
Gamma
Which type of EM wave carries these risks? Damage to skin cells, sunburn, increase risk of skin cancer, age skin prematurely, blindness
Gamma
Microwave
Ultraviolet
Radiowaves
What property of X-rays makes them suitable for medical imaging?
They can pass through flesh but not bone
They are ionising
They travel at the speed of light
They are black and white
What property of gamma radiation makes it suitable for treating cancer and sterilising medical equipment?
It travels at the speed of light
It can be made using radioactive isotopes
It is safe for humans
High doses kill cells and bacteria
What is refraction? Tick 2.
Waves change speed as they pass from one medium to another...
Waves change amplitude as they pass from one medium to another...
... which causes a change in direction
... which causes the wave to reduce in intensity
An EM wave slows down as it crosses the boundary from one substance to the normal. What happens to its direction?
Bends away from the normal
Continues unchanged
Bends towards the normal
Sound waves are... ? Tick 2.
Transverse
Longitudinal
Mechanical
Oscillations in an electric field
What do sound waves do to the ear drum and other solid parts of the human ear?
Make them tickle
Make them vibrate
Make a noise
"Conversion of sound waves in air to vibrations in ear (solid) only works over a limited range of frequencies". This explains which observation:
Loud noises cause damage to hearing
Sounds outside a particular range of frequencies cannot be detected by humans
Very quiet noises cannot be heard
Older humans like different kinds of music than younger humans
What is the frequency range of normal human hearing? Tick 2
Greater than 5Hz
Greater than 20Hz
Less than 20kHz
Less than 50kHz
What is ultrasound?
High frequency EM radiation
Sound waves of frequency less than 20Hz
Sound waves of frequency greater than 20kHz
Sound waves that are like ultraviolet
What happens when ultrasound waves meet a boundary between two substances? Tick 2
Partially reflected
Partially transmitted
We don't know
An image is formed
2 properties of P-waves?
Longitudinal
Transverse
Only travel through solids
Can travel through solids and liquids
2 properties of S-waves?
Transverse
Longitudinal
Can only travel through solids
Travel through both solids and liquids
S-waves are not detected on the opposite side of the earth from the location of the earthquake. This observation suggests that...?
The outer core of the Earth must be solid
The outer core of the Earth must be liquid
The Earth is too big for earthquake waves to travel right round
A concave lens...
Is thinner in the middle than the edges
Bulges out in the middle
A convex lens...
Is thinner in the middle than the edges
Bulges out in the middle
What does a convex lens do to parallel rays of light?
The light converges to the principal focus
The light diverges away from the principle focus
The light continues without changing direction
What does a concave lens do to parallel rays of light?
The light converges to the principal focus
The light diverges away from the principle focus
The light continues without changing direction
The distance from the centre of a lens to the principal focus is...?
The amplitude of the lens
The magnification of the lens
The focal length of the lens
Concave lenses can produce both virtual and real images.
True
False
Convex lenses can produce both virtual and real images.
True
False
What properties do all EM waves of the same colour share? Tick 2.
Same frequency
Same wavelength
Same amplitude
Same attitude
What four things can happen to visible light when it hits an object? Select 2 options
Transmitted, absorbed
Reflected, refracted
Reflected, scattered
Absorbed, dissipated
Specular reflection means...?
Reflection from a rough surface
Reflection from a smooth surface
Diffuse reflection means...?
Reflection from a rough surface
Reflection from a smooth surface
2 words that describe an object that transmits visible light?
Transparent
Opaque
Translucent
Obtuse
If an object is opaque this means that the light incident upon it is being...? Select 2.
Transmitted
Absorbed
Reflected
Refracted
A green filter...? Select 2.
Transmits all colours apart from green
Absorbs all colours apart from green
Transmits only green
Absorbs only green
