The Colours of Optics Trivia Quiz

Answer: Cyan, magenta, and yellow

The additive colours are red, blue, and green.

Answer: Red, green, blue

Mixing two additive colours gives you a subtractive colour. Red and blue make magenta, green and blue make cyan, and red and green make yellow.

Answer: Black

You will end up with black light because the red filter only lets red light through, then the blue filter only lets blue light through. However, since the red filter already removed all of the blue light, the blue filter can't let any light through, so you end up with black light.

Answer: Green

This is because the yellow filter lets through green and red light (because those are the additive colours of which it is composed), then the green filter only lets through green light. This leaves only green light.

Answer: White

This is because magenta is a subtractive colour made up of red and blue. When added with green, this is like mixing all three additive colours together, which would make white light.

Answer: Cones

The rods sense intensity of light. An easy way to remember this is that Cones show Colour. If the cone cells don't work, you are colour blind. If your rod cells don't work, you are completely blind.

Answer: The red and the green parts

TV pixels work on the same principle as the colour wheel of additive and subtractive colours.

Answer: It absorbs all the colours except for green, so you only see green.

The theory about a green cucumber giving off green particles was the commonly accepted theory long ago. The theory used nowadays is that one of two things can happen. The object can absorb all the colours except the colour which it appears to be. This colour is reflected. Example: A purple eggplant only reflects purple light, and absorbs all the other colours.

This is what happens with opaque objects. With translucent objects, only one colour (the colour the object is) is transmitted through the object. Example: a blue bottle only transmits blue light, making it appear both blue and translucent.

Answer: Black

Since the tomato absorbs all the colours of light except red light, and the light being shone on it is blue, it absorbs all of the blue light, leaving no light to be reflected off the tomato. This makes it appear black.

Answer: White

White is made by adding all of the colours together. Since all colours are derived from the additive colours, mixing them also makes white. White appears in the middle of the optics colour wheel. I hope you enjoyed learning a little bit about coloured light and optics, or maybe reviewing what you already knew. Bye!