Light Flashcards
How does light travel?
In straight lines
What travels faster, light or sound?
Light
What is it called when light bounces off a shiny surface?
Reflection
What can you say about the angle of incidence and the angle of reflection?
They are equal
What is refraction?
When light changes direction when it passes into a medium with a different density.
When light travels from air into a glass block, does it bend towards the normal or away from the normal?
Towards
When light travels from a glass block into air, does it bend towards the normal or away from the normal?
Away
Name the colours of the spectrum in order.
Red, orange, yellow, green, blue, indigo, violet
What is it called when light splits up into the spectrum?
Dispersion
What happens to white light when it hits a white object?
All 7 colours of the spectrum are reflected
What happens to white light when it hits a black object?
All 7 colours of the spectrum are absorbed
What happens to white light when it hits a blue object?
Red, orange, yellow, green, indigo and violet are absorbed and blue light is reflected.
What colour light will be seen after white light has passed through a red filter?
Red
What colour will a blue object look through a red filter?
Black
What colour will a white object look through a green filter?
Green
