6.4 Flashcards
(22 cards)
What are the primary colours of light?
Colours of light that cannot be made by adding other colours.
What are the primary colours of light?
The primary colours of light are red, green and blue.
What does adding red light and green light make?
Adding red light and green light makes yellow.
What does adding green light and blue light make?
Adding green light and blue light makes cyan.
What does adding red light, green light and blue light make?
Adding red light, green light and blue light makes white.
Why does the light from the Sun appear to be white?
The seven colours mix, creating an illusion of white light.
What happens when white light shines on a red filter?
Green light does not pass through the red filter.
One other colour of light that does not pass through the red filter is blue light.
Complete the sentence: The green light has been ______ by the red filter.
absorbed
Red light passes through the filter because red light is transmitted by the filter.
What colour passes through the blue filter when white light shines on it?
Blue light
White light consists of 7 colors (Red, orange, yellow, green, blue, indigo, violet). Only blue light is transmitted through the blue filter; the other colors are absorbed.
What happens when blue light that has passed through a blue filter shines on a green filter?
The blue light won’t be transmitted; no light will pass through.
The blue light is subtracted by the green filter.
What type of light does the sign above the shop give out?
The sign gives out yellow light.
What type of lamps does the sign use?
The sign uses white lamps.
How can white lamps produce yellow light?
White light consists of 7 colors, one of which is yellow. Using a yellow filter, other colors are absorbed and only yellow light is transmitted.
What color does a green T-shirt appear in white light?
The green T-shirt appears green in white light.
What does the green T-shirt reflect?
The green T-shirt reflects only green light.
What does the green T-shirt absorb?
The green T-shirt absorbs all the other colors of light.
How would the green T-shirt appear in red light?
The green T-shirt would appear black, indicating the absence of color.
What color of light should be used to make a red car look red?
Red light or white light should be used.
What color of light should be used to make white paper look blue?
Blue light should be used.
What color of light should be used to make a green apple appear black?
Red light or black light should be used.
Why do scientists not consider black to be a colour?
Because black means the absence of colour.
Why do scientists not consider white to be a colour?
Because white reflects all colours; therefore, scientists don’t consider it to be a colour.
