True or False
Red light and blue light make purple light
False
I come in red, green, and blue versions when inside the human eye. Ultraviolet versions of me exist in some animals. What am I?
Cones
Finish the sentence: Light travels in ...
A straight line
Draw a concave lens
Look to the board!
What part of the body are we studying when we talk about 'optics'?
The eye
Concave lenses go inward, like a cave.
True
I am a natural source of light you can find outside. I produce white light, which allows us to see all the colours that we do. What am I?
The sun
Name something that REFLECTS light
Mirror, the colour white, water... multiple correct answers :)
Name one thing a concave lens can be used for, and one thing a convex lens can be used for (specify which one goes with what!)
Glasses - Both. Concave: Flashlight, room light, projector, camera flash... Convex: Laser, camera lens, medical equipment...
Name a part of the eye
Iris, pupil, cornea, lens, optic nerve, cones, rods, etc...
White light can make all the colours of the rainbow
True
I am the part of your eye that controls the size of your pupil. I come in many different colours depending on the person. What am I?
Iris
Name 2 sources of NATURAL light
The sun, any animals that produce bioluminescence
Name the 3 PRIMARY colours of light
Red, Blue, Green
Name an optical illusion you may have seen in real life!
Mirage, rainbow, sun dog, 'The Dress', etc...
Animals with more cones than humans can see in the dark better than us
False
I am not a physical part of your eye, but rather a hole that allows light to travel into your eye so you can see. What am I?
Pupil
How did we prove in class that light travels in a straight line?
Flashlight beam, looking at our shadows.
What are colour wavelengths measured in?
Nanometers (nm)
What would you be lacking in your eye to suffer from colourblindness? (Think of what causes us to see colours!)
Cones
If nothing interrupted the light source and it shone strong enough, it would keep travelling in a straight line forever
True!
I am a colour that is not part of the visible light spectrum for humans. However, due to the right chemiluminescence, humans can see me glow as a light source. The light I make will make your white clothes glow! What am I?
Ultraviolet
Name a time that you would want to ABSORB light in your day to day life
Staying warm on a cold day by wearing black
Name all 3 SECONDARY colours of light
Yellow, cyan, magenta
Name all three types of optical illusions
Physiological, Literal, Cognitive