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English 16 Public

IGCSE PHYSICS

Study Slideshow

Differentiate between longitudinal and transverse wave

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

Define momentum

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

Law of conservation of momentum

the total momentum before collision = total momentum after collision.

Define impulse

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

Define moment of a force

It is the product of force and perpendicular distance.

Principle of moments

clockwise moment = anticlockwise moments

Wave equation

wave speed = frequency x wavelength

Law of reflection

Angle of incidence is equal to angle of reflection.

Properties of image formed by plane mirror

Same size, laterally inverted, virtual

Refractive Index

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

Condition for maximum diffraction

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

Conditions for total internal reflection

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

Define Dispersion

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

Define kinetic energy, write its equation.

Energy possessed due to motion, Kinetic energy = ½mv2

Define potential energy, state its equation.

Energy possessed due to height - mgh

Why the pressure increases when temperature increases

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