Soond & Loight

Solid -Fastest -Particles packed v close Liquid -Less rapid than solid -Particles spacier Gas -Slowest -Particles are far apart frm one another

Louder and higher-pitched and vice versa

Hz (Hertz)

Transverse wave

Transverse -Travels perpendicular to the direction of the vibration (up and down) Longitudinal Wave -Travels parallel to the direction of vibrations (side to side)

• Incident ray, reflected ray and the normal at the point of incidence all lie in the same plane. • Angle of incidence, i is equal to the angle of reflection, r

• Label which side of the mirror is the reflective • Rays/lines on reflective side of mirror must be solid • Rays behind mirror are virtual, dotted • The normal line is dotted • Label the angles of incidence and reflection, must show that i=r • Label the point of incidence with capital I

n = vacuum speed (3.00 * 10(tiny 8)) / medium speed standard form

Lower to Higher optical density = bend towards normal Higher to Lower optical density = bend away from the normal

Light rays converge Light rays diverge