Light on the move
Waves can be longitudinal or what other main type?
A) Electrical
B) Water
C) Transverse
D) Slow
C) Transverse
What can curved mirrors do to light to make pictures?
A) They can form images.
B) They can make sounds louder.
C) They can change the colour of the light.
D) They can absorb all the light.
A) They can form images.
When waves, like light, are completely bounced back inside a material they are already in, rather than passing out, what is this effect called?
A) Total internal reflection.
B) Simple reflection.
C) External reflection.
D) Partial transmission.
A) Total internal reflection.
What is something important that waves, like light or sound, can transfer from one place to another?
A) Matter (the stuff things are made of).
B) Energy.
C) Colour only.
D) Weight.
B) Energy.
Which of these is an example of white light?
A) Ordinary daylight from the sun.
B) Only red light from a laser.
C) Only blue light from a LED.
D) Only the colour green.
A) Ordinary daylight from the sun.
How does the speed of sound change when it travels through different things, like air, water, or solid walls?
A) It always travels at the exact same speed in every material.
B) It travels at different speeds depending on the material.
C) It only travels in empty space (a vacuum).
D) It travels slower in solids than in gases.
B) It travels at different speeds depending on the material.
When light reflects (bounces) off a surface, there is a rule about the angle it hits at and the angle it bounces off at. What is true about these angles?
A) The angle it hits is always much bigger than the angle it bounces off.
B) The angle it hits is the same as the angle it bounces off.
C) The two angles always add up to 90 degrees.
D) The angles change depending on the colour of the light.
B) The angle it hits is the same as the angle it bounces off.
Lenses, used in things like glasses or telescopes, have different jobs because they can change the direction of light. What do lenses do to light?
A) They absorb it completely.
B) They bend it.
C) They make it hotter.
D) They make it travel faster.
B) They bend it.
Can waves be used to transfer information?
A) No, waves only transfer energy.
B) Yes, waves can be used to transfer information.
C) Only sound waves can transfer information.
D) Only light waves can transfer information.
B) Yes, waves can be used to transfer information.
When white light is shone through a prism, what happens to the light?
A) It disappears.
B) It splits into a spectrum of different colours.
C) It gets much brighter.
D) It turns into sound waves.
B) It splits into a spectrum of different colours.
We can see an object, like a book on a table, because:
A) The object makes its own light that goes into our eyes.
B) Our eyes send out a signal that touches the object.
C) Light from the object goes into our eyes.
D) The object absorbs all the light around it.
C) Light from the object goes into our eyes.
Special diagrams called 'ray diagrams' can be used to help work out the picture (image) formed by which type of mirror?
A) A curved mirror.
B) A magnifying mirror.
C) A flat (plane) mirror.
D) A mirror that changes colour.
C) A flat (plane) mirror.
Waves, like light or sound, can be refracted (bent) when they move from one material into a different one. Why does this bending happen?
A) Because the wave's colour changes.
B) Because the wave's direction stays the same.
C) Because the wave's speed changes in the new material.
D) Because the wave's energy becomes zero.
C) Because the wave's speed changes in the new material.
A camera works in a way that is similar to which part of the body?
A) Your hand.
B) Your ear.
C) Your eye.
D) Your brain.
B) Your ear.
How an object looks can change depending on the colour of the light shining on it. Is this statement true or false?
A) True.
B) False.
C) It only happens if the object is black.
D) It only happens if the object is white.
A) True.
Sound waves are an example of which type of wave?
A) Transverse wave
B) Light wave
C) Water wave
D) Longitudinal wave
D) Longitudinal wave
We see objects because light reflects off them and then does what?
A) It is absorbed by the object.
B) It bounces off the air around the object.
C) It changes into heat energy.
D) It travels into our eyes.
D) It travels into our eyes.
What is the name for the effect when waves, like light, bend as they pass from one material into another (for example, from air into water)?
A) Reflection
B) Absorption
C) Transmission
D) Refraction
D) Refraction
Our eyes use a process where light is bent as it enters, which helps us see things clearly. What is this process called?
A) Reflection.
B) Absorption.
C) Focusing.
D) Refraction.
D) Refraction
Visible white light is made up of:
A) Only one single colour.
B) Only two main colours, like red and blue.
C) Many different colours (wavelengths).
D) Only light and dark (black and white).
C) Many different colours (wavelengths).
Light waves are an example of which type of wave?
A) Transverse wave
B) Sound wave
C) Longitudinal wave
D) Heat wave
A) Transverse wave
What is the name for what happens when light bounces off a surface, like a mirror or a wall?
A) Refraction
B) Reflection
C) Absorption
D) Transmission
B) Reflection
Lenses have different uses in different tools (like cameras or microscopes) because of how they _______ light.
A) Generate
B) Reflect
C) Bend
D) Store
C) Bend
Waves can transfer energy and one other important thing. What is the other thing waves can transfer?
A) Mass.
B) Information.
C) Temperature.
D) Smell.
B) Information.
When a prism spreads out white light into its different colours, the band of colours that you see is called a:
A) Shadow.
B) Reflection.
C) Wavelength.
D) Spectrum.
D) Spectrum.