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Waves (Sound (Ultrasound (Sonar, Animal echolocation, Medical uses), Human…

- - - - Bats, certain cetaceans use it
      - utilizes ultrasound, because the higher the frequency of the sound, the lower its wavelength and the smaller the effect of diffraction
      - used in sonars to calculate distance
        make sure you divide the distance by 2! (2-way echo)
        
        Screenshot of an example calculation:
    - - Example calculation:
      - Equation with units:
- - - - Plane Parallel Glass Block
    - - Convex lens diagrams
        
        2f<o
        
        f<o<2f
        
        o<f
      - Concave lens diagrams
        
        o<f
        
        f<o<2f
        
        2f<o
      - Concepts
        
        Real vs virtual image definition
        
        Upright vs inverted image
        
        Magnified vs. shrunken image: example pdiagrams
    - - Critical angle
      - Applications