WAVES AND OPTICS QUIZ (LIGHT & SOUND)
Waves and optics explain how energy travels through space and matter in the form of sound and light. These concepts are important in communication, vision, technology, and everyday life. This quiz tests your understanding of wave properties, sound behavior, and light phenomena.
Waves And Optics Quiz
1. A wave is best defined as
A. Movement of matter only
B. Transfer of energy without transfer of matter
C. Movement of particles permanently
D. Transfer of mass
2. Which of the following is a mechanical wave?
A. Light wave
B. Radio wave
C. Sound wave
D. X-ray
3. Sound waves require a medium because they are
A. Electromagnetic waves
B. Mechanical waves
C. Transverse waves
D. Stationary waves
4. Light waves are classified as
A. Mechanical waves
B. Longitudinal waves
C. Electromagnetic waves
D. Matter waves
5. The distance between two consecutive crests of a wave is called
A. Frequency
B. Amplitude
C. Wavelength
D. Period
Waves And Optics Quiz
6. The number of waves passing a point per second is known as
A. Speed
B. Period
C. Frequency
D. Amplitude
7. The SI unit of frequency is
A. Meter
B. Second
C. Hertz
D. Joule
8. The height of a wave from its rest position is called
A. Frequency
B. Wavelength
C. Amplitude
D. Speed
9. Sound travels fastest in
A. Gases
B. Liquids
C. Solids
D. Vacuum
10. The phenomenon that explains echo is
A. Refraction
B. Reflection
C. Diffraction
D. Interference
Waves And Optics Quiz
11. Which property of sound determines pitch?
A. Amplitude
B. Frequency
C. Speed
D. Wavelength
12. Loudness of sound depends mainly on its
A. Frequency
B. Speed
C. Amplitude
D. Wavelength
13. The bending of light when it passes from one medium to another is called
A. Reflection
B. Refraction
C. Dispersion
D. Diffraction
14. A plane mirror forms an image that is
A. Real and inverted
B. Virtual and upright
C. Real and upright
D. Virtual and inverted
15. The law of reflection states that the angle of incidence is equal to the angle of
A. Refraction
B. Deviation
C. Reflection
D. Diffraction
Waves And Optics Quiz
16. The splitting of white light into different colors is called
A. Reflection
B. Refraction
C. Dispersion
D. Interference
17. Which color of light has the longest wavelength?
A. Violet
B. Blue
C. Green
D. Red
18. Which lens is used to correct short-sightedness (myopia)?
A. Convex lens
B. Concave lens
C. Cylindrical lens
D. Bifocal lens
19. Which lens can form both real and virtual images?
A. Concave lens
B. Convex lens
C. Plane mirror
D. Prism
20. The speed of light in vacuum is approximately
A. 3 × 10⁶ m/s
B. 3 × 10⁸ m/s
C. 3 × 10⁵ m/s
D. 3 × 10⁴ m/s
ANSWERS AND EXPLANATIONS on Waves And Optics Quiz
1. B – Waves transfer energy from one place to another without permanent movement of matter.
2. C – Sound is a mechanical wave because it needs a medium to travel.
3. B – Sound is mechanical and requires particles of a medium to vibrate.
4. C – Light is an electromagnetic wave and does not need a medium.
5. C – Wavelength is the distance between two successive crests or compressions.
6. C – Frequency is the number of complete waves passing a point per second.
7. C – Hertz (Hz) is the SI unit used to measure frequency.
8. C – Amplitude measures the maximum displacement of particles from rest position.
9. C – Sound travels fastest in solids due to closely packed particles.
10. B – Echo is caused by reflection of sound from hard surfaces.
11. B – Pitch depends on frequency; higher frequency gives higher pitch.
12. C – Loudness depends on amplitude; larger amplitude means louder sound.
13. B – Refraction occurs when light bends while moving between different media.
14. B – Plane mirrors form virtual, upright images of the same size.
15. C – The angle of incidence equals the angle of reflection.
16. C – Dispersion splits white light into its component colors.
17. D – Red light has the longest wavelength in the visible spectrum.
18. B – Concave lenses spread light rays to correct short-sightedness.
19. B – Convex lenses form real or virtual images depending on object position.
20. B – Light travels at about 3 × 10⁸ m/s in vacuum.
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