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About this document
- Pages
- 2 pages
- Price
- $2 one-time, yours to keep
- Membership
- Included in every plan
- Format
- Subject
- General Education, Physics
- Module
- PHY101 · Week 4
These lecture notes cover various physics concepts illustrated through everyday phenomena. They help students understand physics principles through familiar examples. Week 4 of the PHY101 module.
What's inside
- Wavelength and frequency of waves
- Sound and light in space
- Pitch and wavelength in musical instruments
- Wavelengths and frequencies of ultraviolet and infrared
- Color production on TV screens
- Lettering on vehicles and diffraction of waves
Who it is for: Students taking the PHY101 module. (Undergraduate)
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Summary
Physics in everyday life covers how physics explains common phenomena. Students learn how physics applies to things they see and hear around them.
Waves and frequency
Waves are created by repeated motion. Frequency affects the wavelength of waves. Examples include water waves and sound waves.
Light and sound
Light and sound travel differently. Light can travel through a vacuum, but sound needs a medium. Sound travels more slowly than light.
Light and colour
Different colours of light have different wavelengths. Mixing coloured lights can make other colours. The screen of a TV or computer uses this.
Light and vision
Light can be polarised. Ultraviolet light has more energy than visible light. LEDs use less power and last longer than CFLs.
Key terms
- Wavelength
- The distance between two points on a wave, such as the distance between two crests.
- Frequency
- The number of times something happens within a certain time period, such as the number of waves that pass a point in a second.
- Diffraction
- The bending of waves around obstacles or through gaps.
- Polarized light
- Light whose vibrations are aligned in one direction.
- Photon
- A particle of light or other electromagnetic radiation.
- LEDs
- Light-emitting diodes, a type of light source.
Questions this document helps with
- What happens to the wavelength of waves if the frequency increases?
- Why can you see a distant explosion in space before you hear it?
- What makes ultraviolet light cause sunburns?
Summary written with AI from the document's text.
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