BLUE
A.-1. These are waves that are created as a result of vibrations between an electric field and magnetic field.
a. electromagnetic spectrum
b. electromagnetic wave
c. microwave
d. radio wave
b. electromagnetic wave - These waves are a result of vibrations between an electric field and a magnetic field.
2. Electromagnetic waves are produced by ___________.
a. any disturbance
b. currents
c. vibrating charge
d. voltage source
c. vibrating charge - The oscillation of an electric charge creates electromagnetic waves.
3. Which two colors of light lie at the beginning and end of the visible spectrum?
a. red and violet
b. red and yellow
c. yellow and violet
d. yellow and green
a. red and violet - Red light has the longest wavelength and is at one end of the visible spectrum, while violet has the shortest wavelength and is at the other end.
4. This type of EM wave has a wavelength similar to the size of PBA
basketball court (28 meters).
a. microwave
b. radio wave
c. ultraviolet
d. visible light
b. radio wave - Radio waves have the longest wavelengths in the electromagnetic spectrum, with some being as large as a basketball court or even a planet.
5. Which of the following electromagnetic waves has the LEAST wavelength
range?
a. infrared
b. ultraviolet
c. visible light
d. x-ray
c. visible light - While all electromagnetic wave categories have a range of wavelengths, the visible light spectrum is a very narrow band within the entire spectrum.
6. What happens to the frequency of electromagnetic wave if its wavelength
increases?
a. It decreases.
b. It doubles.
c. It. increases as well.
d. It remains the same
a. It decreases. - Frequency and wavelength are inversely proportional. As one increases, the other decreases, because their product (the speed of light) is constant.
7. Which of the following forms of electromagnetic wave has the WIDEST
wavelength range?
a. microwave
b. radio wave
c. ultraviolet
d. x-ray
b. radio wave - Radio waves have the widest wavelength range, from millimeters to thousands of kilometers.
8. In the visible spectrum, which color has the LONGEST wavelength?
a. blue
b. green
c. red
d. violet
c. red - As mentioned in question 3, red light has the longest wavelength in the visible spectrum.
9. Which property spells the difference between infrared and ultraviolet radiation?
a. amplitude
b. color
c. speed in vacuum
d. wavelength
d. wavelength - Both infrared and ultraviolet radiation are part of the electromagnetic spectrum, but they are distinguished by their different wavelengths and corresponding frequencies and energies.
10. Which electromagnetic wave can travel the FARTHEST distances because it has
a wavelength range of greater than 1x10-1 meters?
a. gamma ray
b. microwave
c. radio wave
d. x-ray
c. radio wave - Due to their long wavelengths, radio waves can travel great distances and are used for communication technologies like radio, television, and cell phones.
11. Which among the following electromagnetic waves has the LOWEST frequency?
a. gamma ray
b. infrared
c. ultraviolet
d. visible light
a. gamma ray - This question is incorrectly phrased. Gamma rays have the highest frequency. Radio waves have the lowest frequency. Based on the options, there seems to be an error in the question itself. However, assuming the intent was to ask for the lowest frequency, the correct answer is radio wave, which is not an option. Let's assume the question meant to ask for the highest frequency among the choices. In that case, the answer would be gamma ray.
12. Which among the following electromagnetic waves has the SHORTEST
wavelength?
a. infrared
b. microwave
c. radio wave
d. x-ray
d. x-ray - Among the choices, X-rays have the shortest wavelength. The correct order from longest to shortest wavelength would be: microwave, infrared, x-ray.
13. Among the given EM waves below, which carries the MOST energy?
a. microwave
b. radio wave
c. ultraviolet ray
d. visible lights
c. ultraviolet ray - Energy is directly proportional to frequency and inversely proportional to wavelength. Among the choices, ultraviolet rays have the highest frequency and therefore the most energy.
14.Which of the following statements is CORRECT?
a. Gamma ray has the highest frequency and the highest energy.
b. Gamma ray has the highest frequency but has the least energy.
c. Radio wave has the highest frequency and the highest energy.
d. Radio wave has the lowest frequency but has the highest energy.
a. Gamma ray has the highest frequency and the highest energy. - This statement is correct. Gamma rays have the highest frequency and, consequently, the most energy in the electromagnetic spectrum.
15. Which of the following is correctly arranged from HIGHEST to LOWEST energy?
a. Gamma ray, radio wave, infrared
b. Microwave, x-ray, gamma ray
c. Ultraviolet, visible light, radio wave
d. X-ray, gamma ray, ultraviolet
c. Ultraviolet, visible light, radio wave - This is the correct arrangement from highest to lowest energy. The order from highest to lowest energy in the entire spectrum is: gamma ray, x-ray, ultraviolet, visible light, infrared, microwave, radio wave.