physics p1

physics p1

1. TYPES

   • Longitudinal waves
     • These are the waves in which the particles carrying the wave move back and forth along the direction in which the wave is moving
     • Example : Sound waves
     • They have compressions and rarefactions
   • Transverse waves
     • They are waves in which the particles carrying the wave move from side to side at right angles to the direction in which the wave is moving
     • These waves have crests and troughs
     • Examples : ripples on water , light, radio and other electromagnetic waves

2. Wavelength

3. Amplitude

4. Frequency

5. Period

6. Speed

7. Wavefront

8. Reflection

   • It's the change of direction of a wave when it strikes a surface without passing through it
   • Laws of reflection : 1) Angle of incidence = Angle of reflection . 2 ) Incident ray, reflected ray and normal all lie on the same plane .
   • Speed, wavelength and frequency remain unchanged while direction of wave changes

9. Diffraction

   • The spreading out of a wave as it travels through a gap or past the edge of an object

10. Refraction

    • Direction of wave, wavelength and speed change while frequency remains unchanged
    • The bending of a wave on passing from one medium to another
    • When wave travels from deep to shallow, refracted wave bends towards the normal and vice versa