Physics

• Propagation of an oscillation moving energy from one location to another

  Electromagnetic wave and Mechanical wave.
• What is a medium?

  A wave which requires a material medium
• What is a longitudinal wave?

  A wave which the oscillations are parallel to the direction of wave travel and energy transmission.
• What is Electromagnetic wave

  A wave with perpendicular electric and magnetic field oscillations.
• Light always travels at 3.0×10^8 m s-1 through a vacuum.
• What is the physical effect of increasing the amplitude of an electromagnetic wave?

  Increase in brightness
• A particle begins to vibrate at a faster rate than before. The electromagnetic wave the atom produces will be

  Higher change in frequency
• Which of the following will occur when the frequency of a wave is doubled?

  The period will halve
• White light is

  the full, continuous spectrum of visible light.
• Which colour of light will refract to a greater extent when entering a prism?

  Blue light
• Which colour of light will have the highest refractive index?

  Blue light
• Meaning of refractive index?

  The refractive index measures how much light bends when it passes from one medium to another.
•  As the temperature of the air increases, its refractive index decreases
• Outer cladding typically has a lower refractive index than the core.
• The inner cladding has a higher refractive index than the outer cladding.
• The frequency cannot be determined from a displacement-distance graph.
• All electromagnetic waves travel at 3.0×10^8m s-1.
• Infrared is not a component of white light because it has a longer wavelength than the visible spectrum.
• White light consists of all components of the visible light spectrum.
• Formula for calculating one light-year is equal to

  9.4607×10^15, just times the metres with the formula.
• Internal energy is the energy associated with the random disordered motion of atoms and molecules
• the type(s) of energy that make up internal energy?

  kinetic energy of atoms/molecules and potential energy due to interactions between atoms/molecules
• The atoms and molecules in all objects are constantly moving.
• The lowest possible temperature is 0 K, which is equivalent to -273.15 °C.
• the cup of coffee reaches thermal equilibrium with her hand.

  What is temperature a measure of?

  the average translational kinetic energy of the particles in a system
• What does it mean for the teacher’s hand to be in thermal equilibrium with the cup of coffee?

  The hand and the cup of coffee are at the same temperature.
• 735 K (kelvin) converted to degrees celsius?

  735 K - 273(.15) = 462 degrees celsius