reflection of light Flashcards
what does the law of reflection state?
the angle of incidence (i) is equal to the angle of reflection (r)
What are the primary colours?
red
green
blue
what are the secondary colours?
yellow
magenta
cyan
what happens when you mix 2 primary colours?
creates secondary colour
when you mix all of the spectrum, what colour does it make?
white
what colour will a red object reflect?
- reflect red light but absorb other colours
will a transparent object reflect light, if not what will happen?
- allows incident light to pass through
- none is absorbed
will a translucent object reflect light, if not what will happen?
- lets light pass through but its scattered or refracted
- frosted window would be translucent
will an opaque object reflect light, if not what will happen?
no light passes through
define converge
where the line will meet at a point
define convex lens
causes parallel rays of light to converge to the focal point
define concave lens
causes parallel rays of light to diverge as if they had come from a point called the principal focus
give the magnification equation
magnification = image height/object height
- looking at a blue object under a green light, it appears…
- viewing a blue object under a cyan light, it appears…
- viewing a blue object under a yellow light, it appears…
- black
- blue
- black
the student repeated the measurement three times and calculated the mean to reduce the effect of… errors
What 1 word completes the sentence?
- random
which colour clothing would be best for a cyclist to wear and give a reason for your answer
- orange
- because it reflects the most light
specular reflection definition
Reflection from a smooth surface in a single direction
define refraction
the change of direction of a wave that occurs when its speed changes
What can light be at the boundary between two materials? (3)
reflected
transmitted
absorbed
diffuse reflection definition
reflected light is scattered in all directions.
