Waves, heat and light: heat, sound, light and related concepts - One Line Questions

1. What is the boiling point of water at standard atmospheric pressure in Celsius? — 100°C
2. What is the speed of sound in dry air at 20°C? — 343 meters per second
3. Which phenomenon is responsible for the blue color of the sky? — Scattering of light (Rayleigh scattering)
4. What is the distance between two consecutive crests or troughs of a transverse wave called? — Wavelength
5. The pitch of a sound is determined by its: — Frequency
6. The inverse of the period of a wave is its: — Frequency
7. Which instrument is used to measure temperature? — Thermometer
8. What is the temperature at which a solid changes into a liquid called? — Melting point
9. What is the SI unit of heat energy? — Joule
10. Which lens is used to correct hypermetropia (farsightedness)? — Convex lens
11. What is the change of state from liquid to gas called? — Vaporization
12. The transfer of heat through direct contact is called: — Conduction
13. Which type of heat transfer is dominant in liquids and gases? — Convection
14. The process by which heat is transferred through the vibration of particles in a solid is: — Conduction
15. A concave lens is also known as a: — Diverging lens
16. Which lens is used to correct myopia (nearsightedness)? — Concave lens
17. What is the SI unit of heat? — Joule
18. The phenomenon of mixing of two or more waves when they come together is called: — Interference
19. Which type of wave requires a medium for propagation? — Mechanical waves
20. The loudness of a sound is determined by its: — Amplitude
21. The time taken for one complete oscillation of a wave is called its: — Period
22. What is the SI unit of frequency? — Hertz
23. What is the unit of intensity of sound? — Decibel
24. What is the unit of wavelength? — Meter
25. The SI unit of specific heat capacity is: — J/kg·K
26. Which of the following is an example of a longitudinal wave? — Sound wave
27. Which type of waves can travel through vacuum? — Electromagnetic waves
28. What is the process of a solid directly converting into a gas called? — Sublimation
29. The unit of power of a lens is: — Diopter
30. Which of the following is a source of heat energy? — Sun
31. Which type of mirror always forms a virtual, erect, and diminished image? — Convex mirror
32. Which type of mirror is used in headlights of cars to produce a parallel beam of light? — Concave mirror
33. Which of the following is NOT a primary color of light? — Yellow
34. Which color of light has the shortest wavelength? — Violet
35. Which phenomenon explains why we can hear sounds around corners? — Diffraction
36. Which property of light causes it to bend when it passes from one medium to another? — Refraction
37. Which phenomenon explains why a swimming pool appears shallower than it actually is? — Refraction
38. The phenomenon where light bends when passing through a small aperture is called: — Diffraction
39. Which phenomenon causes the shimmering effect of objects seen over a hot surface? — Refraction
40. What is the phenomenon responsible for the formation of rainbows? — Reflection and refraction of sunlight by water droplets
41. What is the term for the change in direction of light when it strikes a surface and bounces back? — Reflection
42. What is the phenomenon of splitting of white light into its constituent colors called? — Dispersion
43. Which of the following is a form of electromagnetic radiation? — Light
44. The heat absorbed or released during a change of state at constant temperature is called: — Latent heat
45. What is the heat required to raise the temperature of 1 kg of a substance by 1°C called? — Heat capacity
46. Which type of wave travels as compressions and rarefactions? — Longitudinal wave
47. What is the minimum number of plane mirrors required to form an image of oneself from all directions? — Three
48. Which color of light has the longest wavelength? — Red
49. Which part of the electromagnetic spectrum is responsible for heating effect of sun rays? — Infrared rays
50. What is the ratio of the speed of a body to the speed of sound in the medium called? — Mach number
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