(LIGHT)
A. REVIEW
1. Medium –
2. Speed of Waves –
B. Parts of the Wave (You must memorize each of the wave parts and be able to label a wave)
1.
2.
3.
4.
5.
Wavelength: One complete cycle, ex: crest to crest OR trough to trough (Units: m, cm, )
Frequency: The number of cycles (or periods) that pass in a second (Unit: Hertz, Hz)
Amplitude: The distance from the middle to the top (Units: m, cm, nm)
Crest: The highest point of the wave (mountain crest or peak)
Trough: The lowest point of the wave (horses and pigs eat from a trough - it’s the shape)
C. Types of Waves: TRANSVERSE vs. LONGITUDINAL
1. Transverse Waves – ________________________________________________________
a. Example:
b. PICTURE (Label the parts):
2. Longitudinal Waves— _____________________________________________________
a. Example:
b. PICTURE (Label the parts):
D. Light and the Electromagnetic Spectrum (Light is a TRANSVERSE wave)
1. What is light? (Briefly describe using the words energy, electrons, and photons.)
2. What can light travel through?
MEDIUM
CAN IT TRAVEL THROUGH?
SPEED
1.
2.
3.
4.
3. What is the speed of light?
a. Speed in a vacuum = __________________ m/s (OR _____________ mph)
b. Speed in other materials:
i. Light travels _____________ in air, water, or glass.
c. Summary:
4. Electromagnetic Spectrum (Use the screen or page 717)
a. Which wave has the highest frequency? ___gamma_____________________________.
b. Which wave has the lowest frequency? ____radio____________________________.
c. AS frequency increases, energy __increases__, wavelength decreases__.
d. Draw appropriate arrows: Frequency ____ Energy _____ Wavelength ____
e. Draw appropriate arrows: Frequency ____ Energy _____ Wavelength ____
Describe the following in terms of frequency, energy, and wavelength (using arrows):
a. Gamma Rays b. Radio Waves –
5. Visible Spectrum
a. What does Roy G. Biv stand for?
b. What color has the longest wavelength in the visible spectrum? ______________
c. What color has the shortest wavelength in the visible spectrum? _____________
d. What color has the smallest frequency? ___________________
e. What color has the largest frequency? ____________________
Draw a picture of the visible spectrum (include wavelengths and color names):
6. LIGHT: Refraction of Light
a. Refraction –
i. Prisms – Glass that bends light. Different ___________ are bent different amounts and
_________ is __________ into different colors.
ii. Which color bends the least? __________________________
iii. Which color bends the most? __________________________
Did you know? Water droplets act like prisms and separate the light as well. This causes a
___________________________. 
E. Summary: Write down 5 main concepts from this lesson in your own words. Use full sentences.
F. Draw the electromagnetic spectrum below. Label the name of the wave type and an arrow indicating when
frequency, energy, and wavelength are increasing.
Energy Increasing