The figure library — page 5

• The brightness no lens can increase
• The cone a fibre will accept
• The cone light has to find to get out
• The invariant that is a count
• The work a diluted beam will not do
• The same cone, and a different arrival
• The beams that add only if they differ
• The nebula no telescope can brighten

Every branch concentration-limit draws, and what checks it

• The field the matter takes away
• The constant that depends on how fast it is asked
• The frequency below which nothing gets in
• A refraction with no wave in it
• The force whose sign a frequency chooses
• The liquid a field turns solid
• The spark that needs room to start
• The glow a thin wire wears before it sparks

Every branch dielectric-response draws, and what checks it

• The note that changes on approach, and the two ways of getting it
• The shift that survives at right angles
• The sky that crowds into a cone
• The cone the source leaves behind
• The shift a mirror gives twice
• The Doppler shift with nothing coming closer
• The speeds a pulsed radar folds into one
• The loudspeaker that goes round

Every branch doppler-wavefronts draws, and what checks it

• The surface that only lets things in
• Two clocks that disagree about the fall
• The orbit that cannot be made smaller
• The horizon that nothing marks
• The orbit that has to shrink
• The circle light cannot leave
• The target that grows as the traveller slows
• The gas a hole catches from far away

Every branch schwarzschild draws, and what checks it

• The size at which a body becomes round
• The ball of gas that heats up as it cools
• The share that is not half a kT
• The disturbance that grows instead of travelling
• The distance that forgets the moon
• The moon kept molten by its neighbours
• The pressure that weighs down what it holds up
• The spinning fluid that becomes a cigar

Every branch self-gravity-limit draws, and what checks it

• The speeds in a still room
• Pressure is a rate of arrival, and the gas law falls out of counting
• Why the air thins with height, and why that is the same law as the speeds
• The gas that leaves is not the gas inside
• The gradient that drives the other thing
• The gas of sound that carries a diamond's heat
• The note too high for thin air
• The puddle that could dry in a second

Every branch speed-distribution draws, and what checks it

• The medium decides the speed, and the source only decides the note
• The speed that depends on the length
• The equation that lets a shape travel
• The correction that took a century
• The wave a surface is enough to hold
• The speed below which nothing on water leaves a wake
• The ripples that answer at half the shaking
• The waves that always arrive square to the beach

Every branch surface-wave draws, and what checks it

• A nucleus with no clock
• The exponential that is only true in the middle
• The energy that did not all arrive
• The chain that runs at its slowest member's rate
• The half-life that chemistry can change
• The spin a photon has to carry away
• The clock read by counting atoms
• The lifetime that depends on where the mirror is

Every branch survival-decay draws, and what checks it

• The liquid that will not slow down
• The whirlpool that comes in one size
• The fountain a lamp can drive
• The transition with nothing to order
• The heat that arrives as a wave
• The speed below which nothing can be made
• The film whose thinnest point sets the flow
• The condensate a trap makes

Every branch vortex-lattice draws, and what checks it

• The inside of a conductor, where the field is exactly nothing
• The charge that has to be somewhere else
• The pressure a charge puts on its own metal
• The resistance that is a length
• The sheet resistance that forgets the shape
• The island that takes electrons one at a time
• The charge that follows no local rule

Every branch conductor-field draws, and what checks it

• The staircase that never reaches the floor
• Hotter than any temperature there is
• The entropy that depends on how fast it was cooled
• A law about spectra, not about heat
• The count that decides which entropy is right
• The two laws absolute zero will not allow
• The mixture that stays mixed at absolute zero

Every branch entropy-staircase draws, and what checks it

• The pressure that is not a temperature
• The mass no cold matter can hold up
• The second experiment that cannot disagree
• The collisions the exclusion principle forbids
• The label three identical quarks forced
• The light a full sea will not scatter
• The cloud that stops shrinking

Every branch fermi-sea draws, and what checks it

• Every minimum is a parabola
• Why heating a perfect spring changes nothing
• The oscillator that answers at three times the question
• The spectrum that weighs a bond
• The molecule that lives outside its own well
• The third of itself a spring carries
• The weight a frequency can find

Every branch harmonic-compare draws, and what checks it

• The table statics cannot settle
• The load nobody applied
• A state no load could reach
• The one number the tolerances cannot touch
• The spool that rolls towards the hand pulling it
• The stack that leans past its own table
• The chimney that breaks a third of the way up

Every branch redundant-supports draws, and what checks it

• Least action, except that it is not least
• The principle that fixes the energy instead of the clock
• The action that knows where every path ends
• The quarter cycle a turning point costs
• The third law that falls out of a change of scale
• The friction an action can hold only by changing its clock

Every branch action-paths draws, and what checks it

• How far a neutrino gets
• The steps in an absorption curve
• The ripple that counts the neighbours
• Below the gap, where there is nothing to absorb
• The pigment that absorbs less for being packed
• The depth an ultrasound image pays for its sharpness

Every branch cross-section draws, and what checks it