PLEASE HELP!! 9TH K12 GCA LIGHT TEST REVIEW SHEET FOR PHYSICS! 100 POINTS!!
1. The Electromagnetic Spectrum
Give the EM spectrum in order from longest to shortest wavelength:
1.
2.
3.
4.
5.
6.
7.
Is the order of waves from lowest to highest frequency or highest to lowest frequency?
Is the order from lowest to highest energy or highest to lowest energy?
Is the order from least to most penetrating or most to least penetrating?
2. Given what you wrote in one,
Radio waves have the ____________ wavelength and the _________ frequency and therefore the _________ energy and the ________ ability to penetrate.
Gamma Rays have the ____________ wavelength and the _________ frequency and therefore the _________ energy and the ________ ability to penetrate.
3. Check all that apply. Which is true?
Frequency is directly related to speed
Frequency is inversely related to wavelength
Wavelength is directly related to speed
4. Check all that apply. Electromagnetic waves:
are Mechanical waves
are Electromagnetic
are Transverse waves
are Longitudinal (Pressure) waves
move perpendicular
move parallel
require a medium
travel through a vacuum
transfer Energy
5. Match the wave on the left with one of its uses on the right.
A. _______ Gamma ray
B. _______ Infrared
C. _______ Radio
D. _______ X-ray
6. In the image below, identify the incident ray and the reflected ray. What do we know about these rays?
a. They are always equal.
b. The incident ray is always bigger.
c. The reflected ray is always bigger.
d. Either the incident ray or the reflected ray can be bigger based on the angle of reflection.
7. The image below shows the visible spectrum. Red is on the far left because it has the ( smallest / largest ) wavelength. Whereas, violet is on the far right because it has the ( smallest / largest ) wavelength.
8. A leaf appears green because the leaf ( reflects / absorbs ) the green wavelengths of light. The light that is reflected are the ones we ( see / do not see ) and wavelengths that are absorbed we ( see / do not see ).
9. In the summer we avoid wearing black and walking on dark surfaces like roads. Geenrally, we wear light or white clothing as well. Why?
10. First complete the definition AND THEN find or draw an image for each of the terms below.
Reflection: When light rays…
Refraction: When light rays…
Diffraction: When light rays…
Opaque Object: Objects that….
Translucent object: Objects that….
Transparent Object: Objects that….