properties of light Flashcards
What electromagnetic radiation can human eyes see?
Visible light
T or F a convex mirror produces a virtual mirrow
T
T or F If you hold a shaving mirror close to your face the image you see is smaller because your face is closer to F and what kind of mirror is it?
Concave
Image will be larger
An object placed on f in a convex what image is produced?
No image is produced cause parallel lines never cross
What is the salt for a plane mirror
S smaller
A upright, inverted
L same distance being mirror
T virtual
What salt is for a diverging mirror
S same size
A upright backwards
L behind mirror
T virtual
What is near\close sighted
Myopia
What is far sighted
Hyperopia
What is myopia and how can it be recorrected?
Near close sighted
Can’t see far but close
Light converges before retina
Diverging lens can open light rays to refocus on retina
What is hyperopia and how can it be recorrected?
Can see far but not close
Light rays focus after retina
Converging lens can refocus light on retina for focused image
Explain 2 rules for total internal reflection to occour
Light must go from a more dense medium to less dense medium
Incident angle must be larger than critical angle
Explain a total internal reflection application
Diamond- jewelers cut angled surfaces to trap the light in diamond and reflect out the top to make it sparkle
Why is the index of refraction dimensionless ?
Ratio of speed of light in a vacuum to the speed of light in another medium
If they both cross each other out in 108 x m/s
