Waves and Nuclear Energy Glossary

	In SHM _________ is proportional to the displacement
	Maximum disturbance of a vibrating system
	The square of the constant of proportionality in the definition of SHM is the ___________ frequency or speed
	The points on a stationary waves where the elements exhibit maximum disturbance
	One _______ mass unit = 931.1 MeV
	________ _________accounts for the mass difference in atomic nuclei
	A reaction which can cause progressively more reactions, especially during fission in which neutrons are released which can induce further fission event, with possible catastrophic consequences.
	Good example of a material used as in control rods
	When two waves share a constant phase relationship
	________ ______ are used to control the rate of a fission reaction, even to stop the reaction in an emergency
	________ damping is when a vibrating system is damped such that it comes to rest in the shortest possible time
	________ _____ is the mass above which uranium-235 is most likely to undergo spontaneous fission
	When energy is removed from a vibrating system
	The bending of light through narrow aperture
	x in SHM equations
	_______ waves are all transverse
	E in E = mc²
	The splitting of heavy nucleons into two roughly equal halves with the possible release of neutrons
	An vibrating system that requires a driving force is described as a _________ vibration
	An SHM system that vibrates and requires no driving force is described as a ________ vibration
	f in SHM equations
	The bands of light and dark produced by the passing of a coherent light source through a double slit system
	The binding together of two light nuclei with a subsequent release of energy
	A finely ruled sheet of glass that produces widely spaced fringes is called a diffraction ____________
	The capture of a neutron by a heavy nucleus is more like to cause ______ fission
	When the superposition of waves causes constructive and destructive regions of vibration
	Waves in which its elements are vibrating along the same line as the direction of propagation of the wave
	What is “m” in the time periodequation for mass-spring pendulum?
	m in E = mc²
	_________ ________ is the difference in mass between independent nucleons and their masses when combined in the nucleus
	Material used to increase the likelihood of the capture of thermal neutrons
	The points on a stationary wave where the elements exhibit minimum disturbance
	The graph of binding energy per ________ against nucleon number shows a characteristic steep rise to around 50u to 60u then follows a gentle decline
	When two waves vibrate with similar motion at the same time then the waves are said to be in _________
	Evidence for the transverse nature of waves – when waves will not pass through a crystal if their line of vibration is orientated at a certain angle to the crystal surface
	The total of kinetic and _________energy is conserved in SHM systems
	Waves that transfer energy are said to be __________
	When a vibrating system vibrates in sympathy due to transfer of energy from a forced vibration vibrating at it’s natural frequency
	________ slit diffraction patterns are recognisable because the angular spread of the first maximum is twice the width of subsequent maxima
	An example of a longitudinal wave
	Optical instrument – can be used in the spectral analysis of light from stars
	c in E = mc²
	What is “k” in the time periodequation for mass-spring pendulum?
	_______ waves are formed when two waves of the same frequency but travelling in opposite directions undergo superposition
	Fission is most effectively induced by _______ neutrons
	t in SHM equations
	T in SHM equations
	When a nucleus changes its identity
	Waves in which its elements are vibrating at right angles to the direction of propagation
	Gradient of a displacement / time graph
	Good example of a material used as a moderator
	______ ______ = frequency x wavelength
	The shortest distance between repeating sections of a wave