Refraction
What is refraction?
Refraction is the changing in direction of a light wave when entering a new medium, caused by a change in its speed.
True or False: Concave mirrors focus light.
True
Is light additive or subtractive?
Additive
What is the Law of Reflection?
θi = θr
What is a photon?
A tiny packet of light.
What is the critical angle?
Angle of incidence at which the angle of refraction is 90 degrees. It occurs at arcsin(n1/n2).
A convex lens has a radius of curvature of 10 cm. What is its focal length?
5 cm
What are the primary and secondary colors of light?
RGB, CMY
Explain the formula for refractive index.
n = c/v, where c is the speed of light in a vacuum and v is the speed of light in the medium
What does LASER stand for?
Light Amplification by Stimulated Emission of Radiation
When the refractive index increases, does light bend toward or away from the normal?
Towards the normal
Explain the properties of the image.
Upright, virtual, smaller
Categorize the following terms into two categories. CMYK, primary colors of light, spotlight, mixing paint, printing, secondary colors of pigment, RGB, secondary colors of light, primary colors of pigment.
Additive: primary colors of light, spotlight, additive, secondary colors of pigment, RGB.
Subtractive: everything else.
What is Snell's law?
n1 sinθ1 = n2 sinθ2
Name and explain briefly each part of the light wave.
Crest, Trough, Amplitude, Wavelength, Frequency (explain them too)
Light enters water at a 60 degree angle. What is the equation to find the angle of refraction?
(sqrt 2)/3 = 1.333 * sin(θ2)
Describe the image created by both convex lenses.
Upright, real, smaller
What color do you get when you shine magenta and yellow on a magenta surface?
Pink/Magenta
E = hf.
E = energy
h = Planck's constant
f = frequency
Name each part of the electromagnetic spectrum in order by increasing wavelength.
Gamma Ray, X-Ray, Ultraviolet, Visible Light, Infarred, Microwave, Radio Waves
What occurs past the critical angle?
Total Internal Reflection
A 10 cm tall cup is placed 6 cm in front of a concave mirror with radius of curvature 8 cm. There is a convex lens 16 cm behind the concave mirror. Describe the image, what is the height, what is the distance, what is the magnification?
distance: 12 cm
height: -20 cm
magnification: -12/6 = -2
(inverted, real, larger)
What does yellow become when you filter out all the green?
Red
What is the thin lens equation, the lens magnification formula, and their mirror equivalents?
Thin Lens equation: 1/f = 1/v-1/u
Lens Magnification: m = v/u
Mirror equation: 1/f = 1/u+1/v
Mirror Magnification: m= -v/u
Name and explain ten parts of the eye.
Hope you got it right.