EM Spectrum and Analog v. Digital

EMS Waves and

Analog v. Digital

2022-2023 Quarter 2 Review

Open Ended

Which is more reliable analog or digital signals? Why?

Electromagnetic Waves (like others) have a frequency & Wavelength. This is important when determining the type of wave and, in visible light, the color.

Reorder

Use the picture to help you order the colors of visible light from longest wavelength to shortest wavelength

• Red

• Yellow

• Green

• Blue

• Violet

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Multiple Choice

Use the picture to help you answer the question: Which electromagnetic wave has the longest wavelength?

• Radio

• Visible Light

• UV

• Gamma

Multiple Choice

Use the picture to help you answer the question: Which electromagnetic wave has the shortest wavelength?

• Radio

• Visible Light

• UV

• Gamma

Multiple Choice

Use the picture to help you answer the question: Which electromagnetic wave has more energy?

• Radio

• Visible Light

• UV

• Infrared

Dropdown

The wavelength of visible light determines its ​ ​

Select answer

.

• Binary Code (0s and 1s)

• Less pure

• Noise/Interference does not impact signal

• Doesn't break down

• More reliable

Digital Signals

• Continuous Signals (Full range)

• Smoother

• Noise/Interference impact signal

• Breaks down easily over time

• Less reliable

Analog Signals

Multiple Select

Select the correct descriptions for analog signals

• Continuous Signal/ Smoother

• Noise/Interference effects them more than digital

• Breaks down easily over time

• pulses of 0s and 1s

• Analog has no use in modern technology

Multiple Select

Select the correct descriptions for digital signals

• Continuous Signal/ Smoother

• Doesn't break down

• Breaks down easily over time

• pulses of 0s and 1s

• Has no use in modern technology

Multiple Choice

Which signal is more reliable?

• Analog because it doesn't last very long

• Digital because it doesn't break down over time and has little issues with interference/noise

• Analog because is is a pure and smooth sound

• Digital because analog isn't used anymore

Multiple Choice

What is a benefit for digital signals?

• You can see them

• They don't use sound

• They are not affected by interference

• They are used for CDs and DVDs