Q: A light wave has a wavelength of $$500\ \mathrm{nm} in a $$vacuum. What is its frequency? (Use $$c = 3.00 \times 10^8$\ \mathrm{m/s})$$

$$6.00 \times 10$$^{14}$$\ \mathrm{Hz}$$

Q: What is the period $$T of a $$wave with frequency $$f = 2 \times 10$$^{15}$$\ \mathrm{Hz}$$?

$$T = 5 \times 10$$^{-16}$$\ \mathrm{s}$$

Q: A wave has a velocity $$v = 2 \times 10^8$\ \mathrm{m/s}$$ and a wavelength $$\lambda = 400\ \mathrm{nm}. $$What is its frequency?

$$5 \times 10$$^{14}$$\ \mathrm{Hz}$$

Q: If the wavelength of visible light is $$600\ \mathrm{nm}$$, what is its frequency in a vacuum?

$$5.00 \times 10$$^{14}$$\ \mathrm{Hz}$$

Question 1

Which of the following phenomena can be explained by both the wave theory and the particle theory of light?

Accepted Answer

Refraction

Question 2

What is the relationship between the speed of light $$c$$, its frequency $$f$$, and its wavelength $$\lambda in a $$vacuum?

Accepted Answer

$$c = f \lambda$$

Question 3

If the frequency of an electromagnetic wave increases, what happens to its energy and wavelength?

Accepted Answer

Energy increases, wavelength decreases

Question 4

A light wave has a wavelength of $$500\ \mathrm{nm} in a $$vacuum. What is its frequency? (Use $$c = 3.00 	imes 10^8$\ \mathrm{m/s})$$

Accepted Answer

$$6.00 	imes 10$$^{14}$$\ \mathrm{Hz}$$

Question 5

Which experiment provided strong evidence for the wave nature of light by showing interference patterns?

Accepted Answer

Young's double-slit experiment

Question 6

What is the period $$T of a $$wave with frequency $$f = 2 	imes 10$$^{15}$$\ \mathrm{Hz}$$?

Accepted Answer

$$T = 5 	imes 10$$^{-16}$$\ \mathrm{s}$$

Question 7

Which statement is true about electromagnetic waves in a vacuum?

Accepted Answer

All electromagnetic waves travel at the same speed

Question 8

Which of the following is NOT explained by the wave theory of light?

Accepted Answer

Photoelectric effect

Question 9

A wave has a velocity $$v = 2 	imes 10^8$\ \mathrm{m/s}$$ and a wavelength $$\lambda = 400\ \mathrm{nm}. $$What is its frequency?

Accepted Answer

$$5 	imes 10$$^{14}$$\ \mathrm{Hz}$$

Question 10

Which of the following best describes amplitude in a wave?

Accepted Answer

Magnitude of maximum displacement from average/zero

Question 11

Which region of the electromagnetic spectrum has the highest energy?

Accepted Answer

Gamma rays

Question 12

If the wavelength of visible light is $$600\ \mathrm{nm}$$, what is its frequency in a vacuum?

Accepted Answer

$$5.00 	imes 10$$^{14}$$\ \mathrm{Hz}$$

Question 13

Which of the following is a correct statement about the relationship between frequency and period?

Accepted Answer

$$f = 1/T$$

Question 14

Which property of electromagnetic waves determines their color in the visible spectrum?

Accepted Answer

Frequency

Question 15

Which SI prefix corresponds to $$10^{-9}$$?

Accepted Answer

nano

Question 16

Which of the following is true about electromagnetic waves with longer wavelengths?

Accepted Answer

They have lower frequencies

Question 17

A student observes a series of light and dark bands on a screen after passing light through two narrow slits. What phenomenon is being observed?

Accepted Answer

Interference

Question 18

Which theory of light can explain the photoelectric effect?

Accepted Answer

Particle theory

Question 19

If the speed of light in water is approximately $$2.25 	imes 10^8$\ \mathrm{m/s}$$, what happens to the wavelength of light compared to its value in a vacuum?

Accepted Answer

It decreases

Question 20

Which of the following is NOT a property of light as a wave?

Accepted Answer

It can cause the photoelectric effect

Introduction to Light and the Electromagnetic Spectrum (1)

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