Question

Question 11 (1 point)

The number of cycles of a periodic wave passing a point in space per second is called the __________________ of the wave.

Question 11 options:

	Frequency
	Amplitude
	Period
	Wavelength

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Question 12 (1 point)

Which of the following colors has the lowest frequency?

Question 12 options:

	Red
	Orange
	Green
	Yellow

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Question 13 (1 point)

Which of the following is not an electromagnetic wave?

Question 13 options:

	X-ray
	Microwaves
	Sound
	Light
	Infrared

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Question 14 (1 point)

The primary difference between x-rays and visible light is that

Question 14 options:

	one is a wave and the other is a photon.
	they travel in air at different speeds.
	light is not electromagnetic wave.
	x-rays are not electromagnetic waves.
	they have different frequencies.

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Question 15 (1 point)

The energy of a red photon is ______ that of a green photon.

Question 15 options:

	same as
	greater than
	greater, same or less, depending on a source of photons
	less than

Answer 1

(11) The number of cycles of a periodic wave passing a point in space per second is called the frequency.

(12) Red , colour has the lowest frequency. It has greatest wavelength.

(13) Sound wave is not an electromagnetic wave , it is a longitudinal wave.

(14) they have different frequencies.

(15) The energy of red photon is less than the green photon as it's frequency is lower than the green .

energy of photon = h× frequency.