Optics quiz (lesson 1-4) Flashcards
What is the speed comparison between light and sound?
Light travels much faster than sound.
Define a luminous object.
A luminous object is one that produces light, e.g., The Sun.
Define a non-luminous object.
A non-luminous object is one that reflects light, e.g., The Moon.
What is the composition of white light?
White light is made up of a mixture of the seven colours of the rainbow.
How can white light be split to demonstrate its components?
White light can be split with a prism.
How are rainbows formed?
Rainbows are formed by the dispersion of light, which can be split into separate colours.
What happens when colours are added together?
Colous can be combined to recreate white light.
How do we perceive the colour of an object?
We perceive the colour of an object based on the light it reflects.
Fill in the blank: A red book appears red because it ______.
reflects red light.
What is one application of using filters in optics?
Filters can be used to block out different colours.
True or False: Many people are aware of their colour blindness.
False.
What percentage of colour-blind pupils are unaware of their condition until tested?
40%.
