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GRADE 10 PHYSICS Question and answers verified to pass

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GRADE 10 PHYSICS Question and answers verified to pass GRADE 10 PHYSICS Crest - correct answer The highest points on a wave Trough - correct answer The lowest points on a wave Wavelength - correct answer Distance between 2 crests or 2 troughs on a wave - Symbol is called a lambd...

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  • October 19, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • grade 10 physics
  • grade 10 physics question and answers verified t

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GRADE 10 PHYSICS
Crest - correct answer ✔The highest points on a wave


Trough - correct answer ✔The lowest points on a wave


Wavelength - correct answer ✔Distance between 2 crests or 2 troughs on a
wave
- Symbol is called a lambda (λ)
- measured in meters (m)
- The longer, the less energy the light is carrying


Amplitude - correct answer ✔The height from the rest position to a trough or
crest


Frequency - correct answer ✔The rate of repetition of a wave
- Measured in Hertz (Hz)


Relationship between wavelength and frequency - correct answer
✔Wavelength is inversely proportional to frequency
- Wavelength (m) = Speed of light (m/s) / Frequency (Hz)
- Speed of light is 3.00 x 10^8 m/s


Luminous - correct answer ✔objects produce light


Non-luminous - correct answer ✔objects reflect light, doesnt produce

, ROYGBIV - correct answer ✔red, orange, yellow, green, blue, indigo, violet
(colors of light)


Incandescence Light - correct answer ✔- Light is produced by an object such
as a metal at a very high temperature
- Filament inside bulb is a thing piece of wire
- Give off heat


Fluorescence Light - correct answer ✔- Light is emitted by some substances
when they are exposed to electromagnetic radiation
- Filled with mercury vapour
- Inside is coated with a white powder called a phosphor
- Gives light and heat


Chemiluminescence - correct answer ✔- Light produced from a chemical
reaction without a rise in temperature


- Chemical glows when it reacts to iron
- Used in glow sticks


Electric Discharge - correct answer ✔- A method for producing light in which
an electric current passes through the air or another gas such as neon
- Lightning is an example


Bioluminescence - correct answer ✔- Ability of plant or animal to produce
light
- Some algae, jellyfish, insects, crustaceans, bacteria, earthworms, and fungi
produce light by bioluminescence

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