LIGHT AND COLOR
WHAT ARE THE PRIMARY COLORS OF LIGHT?
RED
GREEN
BLUE
REFRACTION IS THE BENDING OF LIGHT AS IT TRAVELS THROUGH DIFFERENT MEDIUMS. IT HAPPENS BECAUSE LIGHT SPEEDS UP IN DIFFERENT MEDIUMS BASED OFF THE DENSITY OF THE MEDIUM.
IF I PUT AN OBJECT AT THE FOCAL LENGTH IN FRONT OF A CONVEX LENS, WHAT IMAGE IS CREATED?
NO IMAGE IS CREATED BECAUSE THE IMAGE LIES DIRECTLY ON THE FOCAL POINT AND THEREFORE THE LIGHT DOES NOT CONVERGE AT ONE POINT.
ANDREW YOUNG FIRST DID THE EXPERIMENT AND HE SHOWED THAT LIGHT BEHAVES LIKE A WAVE AND NOT A PARTICLE OPPOSING NEWTON'S IDEA OF CORPUSCLES FROM HIS OPTIKS PUBLISHING.
The angle of incidence and the angle of refraction for light going from air into an unknown material are 63.5deg and 42.9deg respectively.
FIND THE INDEX OF REFRACTION FOR THE UKNOWN.
nr=1.31
1.0003sin(63.5)/(sin(42.9))=1.31
WHAT ARE THE PRIMARY COLORS OF PIGMENT?
MAGENTA
CYAN
YELLOW
HOW DOES LIGHT TRAVEL BEND WHEN TRAVELING FROM A DENSE TO LESS DENSE MEDIUM?
IT TRAVELS AWAY FROM THE NORMAL.
THIS MEANS THAT ANGLE OF REFRACTION IS GREATER THAN THE ANGLE OF INCIDENCE.
IF I PLACE AN OBJECT BEYOND 2F IN FRONT OF A CONVEX LENS WHAT IMAGE IS CREATED?
WHAT IS THE MAIN DIFFERNCE BETWEEN THE SINLGLE SLIT EXPERIMENT AND THE DOUBLE SLIT EXPERIMENT.
IN THE SINGLE SLIT EXPERIMENT THE FRIDGES ARE NOT EQUALLY SPACED AND ARE NOT OF EQUAL WIDTHS. MEANING NO INTERFERENCE PATTERN OCCURS.
IN THE DOUBLE SLIT EXPERIMENT ARE EQUALLY SPACED AND OF EQUAL WIDTH, WHERE THE BRIGHTEST BANDS ARE IN THE MIDDLE AND GROW LESS BRIGHT FURTHER DOWN. WE GET AN INTERFERENCE PATTERN PROVING LIGHT IS A WAVE!
If light is traveling at 1.72 x 10^8 m/s through a medium. What is the medium’s index of refraction?
n=c/v
3*10^8/(1.72*10^8)=1.74
index is likely methylene iodine.
HOW DOES LIGHT BECOME POLARIZED?
LIGHT BECOMES POLARIZED BY CREATING A BLOCK SO THAT ONLY ONE PLANE OF LIGHT COMES THROUGH. I.E SUNGLASSES
HOW DOES LIGHT TRAVEL MOVING LESS DENSE TO MORE DENSE MEDIUM?
LIGHT WILL REFRACT TOWARDS THE NORMAL WHEN TRAVELING FROM LESS DENSE TO MORE DENSE MEDIUM.
THIS MEANS THAT THE ANGLE OF INCIDENCE IS GREATER THAN THE ANGLE OF REFRACTION.
WHAT IS A SPECIAL PROPERTY ABOUT PLANE MIRRORS.
PLANE MIRRORS ALWAYS CREATE A VIRTUAL IMAGE THAT IS THE SAME DISTANCE THAT THE OBJECT IS IN FRONT OF THE MIRROR.
THE IMAGE IS REVERSED LEFT TO RIGHT
THE IMAGE IS THE SAME SIZE AS THE OBJECT.
WHAT HAPPENS IN THE DOUBLE SLIT EXPERIMENT WHEN WE MAKE THE SLIT WIDTH LARGER AND WHEN WE MAKE THE SLIT WIDTH SMALLER?
LARGER SLIT WIDTH: CREATES A NARROWER AND SHARPER PATTERN. MORE INTERFERENCE HAPPENS.
SMALLER SLIT WIDTH: CREATES A WIDER AND LESS DISTINCT PATTERN. LESS INTERFERENCE HAPPENS.
An object is placed 8.5 cm to the left of a convex lens that has a focal length of 5.5cm.
What is the image distance?
1/f = 1/do +1/di
1/5.5 -1/8.5= .064
1/.064=15.58=15.6
WHAT IS THE DIFFERENCE BETWEEN ADDITIVE COLOR AND SUBTRACTIVE COLOR.
ADDITIVE COLOR APPLIES TO LIGHT AND WE ADD THE COLORS; RED, GREEN, AND BLUE TO MAKE WHITE LIGHT.
SUBTRACTIVE COLOR APPLIES TO PIGMENT LIKE PAINT. WE REMOVE COLORS FROM WHITE.
THE MOSTTT IMPORTANT THING WHEN TRYING TO SOLVE FOR THE ANGLE OF REFRACTION OR ANGLE OF INCIDENCE IN THE CALCULATOR IS TO ALWAYS REMEMBER WHAT MATHEMATICAL EXPRESSION
TO FIND THE ANGLE ONCE YOU HAVE SIN(THETA) BY ITSELF IS TO USE THE INVERSE SIN FUNCTION
SIN^-1 WILL GIVE YOU THETA BY ITSELF.
ONE THING TO ALWAYS REMEMBER WHEN DEALING WITH THE TWO TYPES OF LENSES(CONVERGING AND DIVERGING) IS THAT THE FOCAL LENGTH IS ALWAYS...?
FOR A CONVERGING LENS, THE FOCAL LENGTH IS ALWAYS POSITIVE.
FOR A DIVERGING LENS THE IMAGE IS ALWAYS NEGATIVE.
AS I MOVE THE SLITS EITHER FURTHER FROM THE LIGHT SOURCE OR CLOSER TO THE LIGHT SOURCE WHAT HAPPENS TO THE INTERFERENCE PATTERN?
FURTHER: CREATES FRIDGES THAT ARE MROE SPREAD OUT AND LESS INTENSE
CLOSER: CREATES MORE INTENSE AND BRIGHTER INTERFERENCE PATTERNS.
A 3.5 cm tall object is placed 38 cm from a convex lens and the image is formed 27.6 cm from the lens.
a. What is the height of the image?
hi/ho = -di/do
hi/3.5 = -27.6/38
hi= (-27.6*3.5)/38
hi=-2.54cm
WHAT ARE THE COMPLEMENTARY COLORS FOR EACH PRIMARY COLOR OF LIGHT
RED
GREEN
BLUE
RED-CYAN
GREEN-MAGENTA
BLUE-YELLOW
HOW DOES EACH LIGHT RAY BEHAVE WHEN TRAVELLING THROUGH THESE MEDIUMS?
A) AIR TO CROWN GLASS
B) GLYCERIN TO AIR
A) SINCE IT GOES FROM LESS DENSE TO MORE DENSE THE LIGHT WILL BEND TOWARDS THE NORMAL.
B) SINCE IT GOES FROM DENSE TO LESS DENSE THE LIGHT WILL BEND AWAY FROM THE NORMAL.
WHAT TYPE OF IMAGE IS FORMED IF I PLACE AN OBJECT BETWEEN F AND 2F IN FRONT OF A DIVERGING LENS?
PLACING OBJECT IN FRONT OF DIVERGING LENS REGARDLESS OF ITS POSITION WILL ALWAYS GIVE ME AN IMAGE THAT IS:
VIRTUAL, UPRIGHT, AND SMALLER.
WHAT IS THE HUGE PROBLEM WITH THE DOUBLE SLIT EXPERIMENT? THAT IS, WHAT WAS THE RESULT OF THE DOUBLE SLIT EXPERIMENT AND WHAT WE KNOW ABOUT LIGHT?
WHAT IS THIS CALLED?
LIGHT BEHAVES LIKE A WAVE FOR THE MOST PART BUT CAN ALSO BEHAVE LIKE A PARTICLE WHEN PARTICUALR MEASUREMENTS OR OBSERVATIONS HAPPENS
THIS IS CALLED THE WAVE-PARTICLE DUALITY.
Find the angle of refraction of a ray of light that enters methylene iodine from air at an angle of 15 degrees to the normal.
1.0003(sin 15) = 1.74 (sin θ)
0.259/ 1.74 = sin θ
θ = sin-1(0.149) = 8.6 degrees