Light Flashcards
Light travels in …
straight lines
Light is an …
Electromagnetic wave
Shadows from when …
light cannot reach an area
Always draw arrows on …
the light rays
Always draw a dotted …
Normal line
Use a …
Ruler
The normal line is always …
90 degrees from surface
Occurs when light travels through an object
Refraction
When light goes in to another medium it changes direction …
Closer to the normal
Occurs when light bounces off an object
Reflection
Law of reflection
Angle of incidence = Angle of reflection
What mirror? Angles viewing angle. Objects appear smaller
Convex mirror
What mirror? Objects upside down if far away. Objects appear larger if close to mirror.
Concave Mirror
What lense is this? Converges to light. Objects far away are upside down. Objects close up are magnified
Convex lense
What lense is this? Diverges the light. Widens field of vision. Objects seem smaller.
Concave lenses
Name the three primary colours
Red blue green
Mix two of the primary colours and get …
Magenta Cyan Yellow
Mix all three primary colours to get …
White
When light hits an object all colour other than the one we see is
absorbed
Describe dispersion
Dispersion is when you shine white light at certain angles and you can split it into all of its parts. For this we use a prism.
