Download Light and Mirror Notes

Name________________________
Light & Mirrors Part I Notes
Period______
Light (General Information):
1.
2.
3.
4.
5.
6.
7.
Dual Nature of Light:
Wave when it:
Particle when it:
A particle of light is called a ___________________
Vocabulary:
Luminous:
Illuminated
Transparent
Translucent
Opaque
Calculations:
Speed of Light (All EM Waves)
History:
List EM waves from lowest frequency to highest Frequency
As wavelength increases, frequency __________and energy __________
As frequency increases, wavelength __________and energy __________
Longest EM Wave_______________
Shortest EM Wave___________
Longest Visible Light Color_______________ Shortest Visible Light Color___________
EM Spectrum Characteristics:
Example 1:
The wavelength of an electromagnetic wave measures 3.63 x 10 -10 m. What is the frequency of this waveform?
Is it an infrared wave? Explain.
How We See:
Rod Cells:
Cone Cells:
White:
Black:
Primary Color of light:
Secondary Colors of Light:
Light & Mirrors Part II Notes
Polarization
Speed of Light
At a boundary:
Law of Reflection
Specular
Diffuse
Total Internal Reflection
Object
Image
Describing Images:
Size
Orientation
Virtual
Real
Types of Mirrors
Plane
Converging
Object
Location
Real or
Virtual
Erect or
Inverted
Diverging
Size
Image
Location
Plane Mirror
Concave Mirror
Convex Mirror
Attach Your Ray Diagrams Here
Calculations
Where:
C or R
Center of Curvature; Radius
f
do
Focal length
Object distance from mirror
di
Image distance from mirror
ho
hi
M
Object height
Image height
Magnification
Lens/Mirror Equation:
1
1
1


f dO d I
Magnification Equation: m = -di/do = hi/ho
Ex 2: A concave mirror has a focal length of 25 cm. An object is placed 32 cm from the mirror.
A.
What kind of image is formed? (real or virtual) Why?
Ex 3:
Ex 4:
B.
Calculate the image distance.
C.
Calculate the magnification.
A smooth reflective disco ball hangs from a ceiling. It has a diameter of 50 cm. An object (16 cm tall) is
placed 3 meters from the mirror.
A.
What kind of image is formed? (real or virtual) Why?
B.
Calculate image distance.
C.
Calculate the height.
Suppose you are 19 cm in front of the bell of your friend’s trumpet and you see your image at 14 cm. treating
the trumpet’s bell as a concave mirror, what would be its focal length and radius of curvature?
Challenge:
Ex 5: Suppose you place a 5.0 cm tall pencil in front of a concave mirror. The mirror has a focal length of 24 cm.
The pencil forms an image that appears to be at the same position as the pencil, but the image is inverted.
A. Where did you place the pencil?
B. How tall is the pencil’s image?