Energy
Light and Waves
Reflection and Refraction
How we see?
Sound
100
What are the main two types of energy?
Stores (potential) and Active (kinetic)
100
In which objects does light travel through
a. Opaque
b. Transparent
c. Translucent
b and c
Translucent objects allow for some light to go through
100
What is refraction?
a. bouncing light
b. bending light
Bending light
100
What is the nemonic we use to remember the order of the colours in the rainbow?
ROY G BIV
100
Sound can travel through air, liquid and solids
yes
200
What is the unit we use for Energy?
Joules
200
What is the speed of light? And what type of wave is it?
300,000 Km/s or 300,000,000 m/s
Light is a transverse wave
200
What happens to white light when travels through a triangular prism?
Refracts into the 7 colours of the rainbow (visible spectrum of light)
200
Which colour has the smaller wavelength
Violet
200
Sound travels faster through
a. air
b. liquid
c. solid
Because
Through solid because particles are closer together
300
What is Energy Efficiency?
The percentage of energy that is not wasted.
For example: some times energy can be wasted in the form of heat. Electricity light a bulb but not all the energy is used as light, some gets wasted as heat.
300
Does light travel through vacuum (space)?
How about sound?
Light travels through vacuum but sound can't because there are not enough particles in space for sound to travel through
300
Using a flat mirror how are the angle of incidence and the angle of reflection?
The same
300
What are the colors reflected by a red car?
Red
300
What is the unit we use to measure sound?
Decibels (Db)
400
How do you define Renewable Energy?
Energy that does not un out
400
A disturbance that travels through a medium from one location to another location is a
wave
400
Is this a concave or a convex mirror?
Convex mirror.
Are curved outwards and are sued as security mirrors in shops because they give a wide field of view
400
What is the part of our eye that controls the amount of light going through the lens into the retina?
pupil
400
Relate loudness and pitch to amplitude and frequency of a wave
The amplitude is the loudness of a sound, the frequency is the pitch of sound
500
What does the principle of conservation of energy say?
That energy is not created or destroyed, it transforms form one type to another.
500
Define and give the units for:
- wavelength
- amplitude
- frequency
- wavelength: distance between two crests of a wave (metres)
- amplitude: height of a wave (metres)
- frequency: number of waves per second (Hertz)
500
What causes refraction?
The change in the speed of light when changing mediums of different density
500
What do our ears and eyes have in common?
That sound and images are sent to the brain through electrical impulses
500
Name the parts of the ear in order from outer ear to inner ear
Ear, Auditory canal, Eardrum, Ossicles, Cochlea, Auditory Nerve, Brain