11. The most dangerous type of light in the universe is;
a. microwave
c. Xray
b. gamma ray
d. ultraviolet wave
12. The color with the longest wavelength is:
a.yellow b. red c. orange
d. blue
13. Which color has the longest waves?
a. yellow b. red
c. orange
d. blue
14. Which color has the lowest frequency?
a. yellow b.red
c. orange
d. blue
15. If a material absorbs all frequencies of light waves EXCEPT green, what color will be perceived by the
observer?
a. yellow b. indigo C. orange
d.green
16. The wavelength from red to violet is:
a. increasing
C. can't be determine
b. decreasing
d. the same
_17. The frequency from red to violet is:
a. increasing
C. can't be determine
b. decreasing
d. the same
18. Which of the following is NOT a unit of temperature,
a. Calorie
C. Celsius
b. Fahrenheit.
d. Kelvin​