PHYS 165 Module 5 | Physics Exam Q&A | Portage
Learning
These are 100 original multiple-choice practice questions for PHYS 165 Module 5.
Since exact module content varies by institution, this set assumes Module 5 covers
electromagnetic waves, geometric optics, reflection, refraction, lenses and
mirrors, wave optics, interference, diffraction, polarization, and introductory
modern physics. They are not official examination questions and are not copied from
any textbook, test bank, or copyrighted source.
Question 1:
Electromagnetic waves are produced by:
A. Stationary charges
B. Accelerating charges
C. Neutral particles
D. Only magnetic monopoles
Correct answer: B
Rationale:
Accelerating charges produce electromagnetic waves.
Question 2:
Electromagnetic waves travel at the speed of light in a vacuum, approximately:
A. 3.0 × 10⁶ m/s
B. 3.0 × 10⁸ m/s
C. 3.0 × 10¹⁰ m/s
D. 3.0 × 10⁵ m/s
Correct answer: B
Rationale:
c ≈ 3.0 × 10⁸ m/s in a vacuum.
Question 3:
In an electromagnetic wave, the electric and magnetic fields are:
A. Parallel to each other
B. Perpendicular to each other and to the direction of propagation
,C. Parallel to the direction of propagation
D. Randomly oriented
Correct answer: B
Rationale:
E and B are mutually perpendicular and perpendicular to propagation.
Question 4:
Which electromagnetic wave has the longest wavelength?
A. Gamma rays
B. X-rays
C. Radio waves
D. Visible light
Correct answer: C
Rationale:
Radio waves have the longest wavelengths in the EM spectrum.
Question 5:
Which electromagnetic wave has the highest frequency?
A. Radio waves
B. Microwaves
C. Gamma rays
D. Infrared
Correct answer: C
Rationale:
Gamma rays have the highest frequency and shortest wavelength.
Question 6:
Visible light has wavelengths approximately between:
A. 100–200 nm
B. 400–700 nm
C. 1–10 mm
D. 0.01–0.1 nm
Correct answer: B
,Rationale:
Visible light ranges from about 400 nm (violet) to 700 nm (red).
Question 7:
The electromagnetic spectrum, ordered from longest to shortest wavelength, is:
A. Radio, microwave, infrared, visible, UV, X-ray, gamma
B. Gamma, X-ray, UV, visible, infrared, microwave, radio
C. Visible, UV, X-ray, gamma, radio, microwave, infrared
D. Infrared, visible, UV, radio, microwave, X-ray, gamma
Correct answer: A
Rationale:
Longest to shortest: radio, microwave, infrared, visible, UV, X-ray, gamma.
Question 8:
The relationship between wavelength and frequency is:
A. c = fλ
B. c = f/λ
C. c = λ/f
D. c = f + λ
Correct answer: A
Rationale:
c = fλ for electromagnetic waves.
Question 9:
A radio wave has frequency 100 MHz. Its wavelength is:
A. 0.3 m
B. 3 m
C. 30 m
D. 300 m
Correct answer: B
Rationale:
λ = c/f = (3 × 10⁸)/(1 × 10⁸) = 3 m.
, Question 10:
The law of reflection states that the angle of incidence equals:
A. The angle of refraction
B. The angle of reflection
C. Twice the angle of reflection
D. Half the angle of reflection
Correct answer: B
Rationale:
θ_i = θ_r for reflection.
Question 11:
The angle of incidence is measured relative to the:
A. Surface
B. Normal
C. Reflected ray
D. Refracted ray
Correct answer: B
Rationale:
Angles in optics are measured from the normal (perpendicular to the surface).
Question 12:
A plane mirror forms an image that is:
A. Real and inverted
B. Virtual and upright
C. Real and upright
D. Virtual and inverted
Correct answer: B
Rationale:
A plane mirror forms a virtual, upright image of the same size.
Question 13:
For a plane mirror, the image distance equals:
Learning
These are 100 original multiple-choice practice questions for PHYS 165 Module 5.
Since exact module content varies by institution, this set assumes Module 5 covers
electromagnetic waves, geometric optics, reflection, refraction, lenses and
mirrors, wave optics, interference, diffraction, polarization, and introductory
modern physics. They are not official examination questions and are not copied from
any textbook, test bank, or copyrighted source.
Question 1:
Electromagnetic waves are produced by:
A. Stationary charges
B. Accelerating charges
C. Neutral particles
D. Only magnetic monopoles
Correct answer: B
Rationale:
Accelerating charges produce electromagnetic waves.
Question 2:
Electromagnetic waves travel at the speed of light in a vacuum, approximately:
A. 3.0 × 10⁶ m/s
B. 3.0 × 10⁸ m/s
C. 3.0 × 10¹⁰ m/s
D. 3.0 × 10⁵ m/s
Correct answer: B
Rationale:
c ≈ 3.0 × 10⁸ m/s in a vacuum.
Question 3:
In an electromagnetic wave, the electric and magnetic fields are:
A. Parallel to each other
B. Perpendicular to each other and to the direction of propagation
,C. Parallel to the direction of propagation
D. Randomly oriented
Correct answer: B
Rationale:
E and B are mutually perpendicular and perpendicular to propagation.
Question 4:
Which electromagnetic wave has the longest wavelength?
A. Gamma rays
B. X-rays
C. Radio waves
D. Visible light
Correct answer: C
Rationale:
Radio waves have the longest wavelengths in the EM spectrum.
Question 5:
Which electromagnetic wave has the highest frequency?
A. Radio waves
B. Microwaves
C. Gamma rays
D. Infrared
Correct answer: C
Rationale:
Gamma rays have the highest frequency and shortest wavelength.
Question 6:
Visible light has wavelengths approximately between:
A. 100–200 nm
B. 400–700 nm
C. 1–10 mm
D. 0.01–0.1 nm
Correct answer: B
,Rationale:
Visible light ranges from about 400 nm (violet) to 700 nm (red).
Question 7:
The electromagnetic spectrum, ordered from longest to shortest wavelength, is:
A. Radio, microwave, infrared, visible, UV, X-ray, gamma
B. Gamma, X-ray, UV, visible, infrared, microwave, radio
C. Visible, UV, X-ray, gamma, radio, microwave, infrared
D. Infrared, visible, UV, radio, microwave, X-ray, gamma
Correct answer: A
Rationale:
Longest to shortest: radio, microwave, infrared, visible, UV, X-ray, gamma.
Question 8:
The relationship between wavelength and frequency is:
A. c = fλ
B. c = f/λ
C. c = λ/f
D. c = f + λ
Correct answer: A
Rationale:
c = fλ for electromagnetic waves.
Question 9:
A radio wave has frequency 100 MHz. Its wavelength is:
A. 0.3 m
B. 3 m
C. 30 m
D. 300 m
Correct answer: B
Rationale:
λ = c/f = (3 × 10⁸)/(1 × 10⁸) = 3 m.
, Question 10:
The law of reflection states that the angle of incidence equals:
A. The angle of refraction
B. The angle of reflection
C. Twice the angle of reflection
D. Half the angle of reflection
Correct answer: B
Rationale:
θ_i = θ_r for reflection.
Question 11:
The angle of incidence is measured relative to the:
A. Surface
B. Normal
C. Reflected ray
D. Refracted ray
Correct answer: B
Rationale:
Angles in optics are measured from the normal (perpendicular to the surface).
Question 12:
A plane mirror forms an image that is:
A. Real and inverted
B. Virtual and upright
C. Real and upright
D. Virtual and inverted
Correct answer: B
Rationale:
A plane mirror forms a virtual, upright image of the same size.
Question 13:
For a plane mirror, the image distance equals:
