DIRECTION: read each item carefully. Use a separate sheet for your answer. Write only the letter of the correct answer for each question

1. What is the example of wave with a long wavelength and low frequency?
a. Radio waves
b. Ultraviolet
c. Visible light
d. Gamma rays
2. Which of the following is the correct order of electromagnetic waves in the electromagnetic spectrum?
a. Gamma rays, X-rays, ultraviolet rays, visible light infrared, microwave. radio waves
b. Radio waves, infrared, ultraviolet rays, microwaves, X-rays, gamma rays
c. Gamma rays. X-rays, ultraviolet rays, infrared, microwave, radio wave
d. Radio waves, infrared, visible light, ultraviolet rays, microwave, gamma rays, X-rays
3. Which of the following electromagnetic waves has the highest frequency?
a. ultraviolet
b. violet light
c. infrared wave
d. microwave
4. In vacuum, what is the speed of the ultraviolet wave which is more energetic and has a higher frequency than visible light?
a. 3 x 10 m/s
b. 3.5 x 108 m/s
c. 4 x 108 m/s
d. 5.1 x 10 m/s
5. In the visible spectrum, which color has a longest wavelength?
a. yellow
b. green
c. red
d. purple​