Waves - Revision

The kinetic energy of the molecules increases, and more frequent collisions.

Momentum is the product of mass and velocity (m x v) unit - kgm/s

the total momentum before collision = total momentum after collision.

Light should be traveling from denser to rarer medium, angle of incidence must be greater than critical angle

In longitudinal waves, the vibrations are parallel to the direction of wave travel. transverse waves,the vibrations are at right angles to the direction of wave

n = sin i/sin r (Snell’s law), n = v1/v2 ,n = c/v, n = 1/sin C

wave speed = frequency x wavelength

splitting of white light (red being longer wavelength deviates least and violet deviates most)

It is the product of force and perpendicular distance.

Energy possessed due to motion, Kinetic energy = ½mv2

clockwise moment = anticlockwise moments

Angle of incidence is equal to angle of reflection.

For maximum diffraction, the wavelength must be equal to the gap size.

Energy possessed due to height - mgh

Impulse = Force x time, Impulse = change in momentum (mv - mu)

Same size, laterally inverted, virtual