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EM Waves > Wavelength And Frequencies > Flashcards

Wavelength And Frequencies Flashcards

1
Q

True or False: Wavelength is inversely proportional to frequency.

A

True

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2
Q

What is the formula that relates wavelength (λ), frequency (f), and the speed of light (c)?

A

c = λ * f

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3
Q

Which type of electromagnetic wave has the longest wavelength?

A

Radio waves

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4
Q

True or False: Gamma rays have a longer wavelength than infrared waves.

A

False

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5
Q

Fill in the blank: The frequency of a wave is defined as the number of _____ per second.

A

cycles

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6
Q

As the frequency of an electromagnetic wave increases, what happens to its wavelength?

A

It decreases.

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7
Q

What is the frequency of a wave with a wavelength of 1 meter in a vacuum?

A

299,792,458 Hz

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8
Q

Which electromagnetic wave is commonly used for communication?

A

Radio waves

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9
Q

True or False: Ultraviolet light has a higher frequency than visible light.

A

True

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10
Q

What is the wavelength range of visible light?

A

Approximately 400 to 700 nanometers

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11
Q

What type of electromagnetic wave is used in medical imaging?

A

X-rays

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12
Q

Fill in the blank: The electromagnetic spectrum is arranged from _____ to _____ wavelengths.

A

longest; shortest

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13
Q

What is the relationship between energy and frequency in electromagnetic waves?

A

Energy is directly proportional to frequency.

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14
Q

What is the frequency of microwave radiation typically used in cooking?

A

2.45 GHz

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15
Q

True or False: Infrared radiation is primarily emitted by hot objects.

A

True

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16
Q

What is the unit of measurement for wavelength?

A

Meters (m)

17
Q

As you move from radio waves to gamma rays in the electromagnetic spectrum, what happens to the frequency?

A

It increases.

18
Q

What type of electromagnetic radiation can cause sunburn?

A

Ultraviolet light

19
Q

Fill in the blank: The electromagnetic spectrum encompasses all _____ of electromagnetic radiation.

A

frequencies

20
Q

What is the primary use of infrared waves?

A

Thermal imaging and remote controls

21
Q

True or False: The higher the frequency, the lower the energy of the electromagnetic wave.

A

False

22
Q

What is the typical wavelength of visible light?

A

Approximately 400 to 700 nanometers

23
Q

What type of waves are used in Wi-Fi technology?

A

Microwaves

24
Q

Fill in the blank: Light travels at a speed of _____ in a vacuum.

A

299,792,458 m/s

EM Waves (2 decks)

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