The figure library — page 4

• Only some notes fit, and that is where discreteness comes from
• The drum that has no harmonics
• The pipe that will not carry a low note
• How many ways there are to vibrate
• The count that cannot be cheated
• The dent that raises the note
• The string whose end will not keep still
• The tide a lake makes by itself
• The chain that swings in Bessel's notes
• The oven that cooks in spots

Every branch membrane-modes draws, and what checks it

• The pressure that comes from counting
• What it costs to take the salt out
• The membrane that almost holds
• The swelling a membrane cannot stop
• The counterions that never leave the chain
• The like charges that pull together
• The pressure that stops counting molecules
• The cell that bursts by geometry
• The waterfall at every river mouth
• The stem that stands by pressure

Every branch osmotic-cell draws, and what checks it

• The wave that stretches one way and squeezes the other
• The orbit that has to shrink
• What the instrument actually hears
• A few cycles that are only mass and spin
• The ring that does not come back
• The radiation a difference in falling would make
• The mountain a spinning star is allowed
• The wobble that radiating makes larger
• The four shapes a wave of gravity leaves out
• The bar a wave of gravity barely touches

Every branch quadrupole-wave draws, and what checks it

• Light has a pressure
• The size the light cannot blow away
• The brightness a mass cannot exceed
• The light that pulls rather than pushes
• The friction made of light
• The limit that belonged to a simpler atom
• The atoms the light stops touching
• The light that makes a cold cloud repel itself
• The mirror held on a spring of light
• The fuel held together only by its inertia

Every branch radiation-pressure draws, and what checks it

• Turning is an acceleration, and constant speed does not help
• The forces that are not there
• The surface a spin decides
• The deflection that closes on itself
• The ratio that decides whether the planet is turning
• The wave that can only travel west
• The ball a turntable will not throw off
• The spin that sorts by a difference of mass
• The governor that needed friction to work
• The loop that is not a circle

Every branch rotating-frame draws, and what checks it

• Why the sky is blue and the sunset is not, from one exponent
• When the particle is the size of the wave
• Why a litre of water is not blue for the reason the sky is
• Everything a scatterer removes, from one direction
• The cloud light has to walk through
• The walk that interference can stop
• The full moon that is too bright
• The sand that darkens when it is wet
• The light that comes back bluer when it is warm
• How far the air lets a mountain be seen

Every branch scattering-spectrum draws, and what checks it

• The field that wraps a current
• The loop that behaves like a needle
• The field outside the solenoid, which is not zero
• The law that is always true and rarely useful
• The field that points against the magnet it is in
• A potential that does not come back to itself
• The force between pieces of a current
• The current that squeezes what carries it
• The push at the end of a pair of rails

Every branch ampere-loop draws, and what checks it

• The wall that is not quite a wall
• The reflection that happens where the glass is not
• A wall that a factor of two makes impassable
• The last atom does all the seeing
• Two walls that let more through than one
• How long the crossing takes
• The circuit that goes through a wall
• The electrons a field pulls from cold metal
• The atom a light wave opens like a wall

Every branch barrier-tunnel draws, and what checks it

• The crystal that answers twice
• The rotation a return trip doubles
• The phase that is only a shape
• The law that only asks about one component
• The ray on the wrong side of the normal
• The reflection that needs no surface
• The crystal made of moments
• The surface that cancels whatever skims it
• The rough surface that is a mirror at a glance

Every branch birefringence draws, and what checks it

• The exponential that decides everything
• The temperature a molecule does not have
• The reaction that cannot go all the way
• The site that fills like an electron level
• The product doping cannot move
• The voltage that is a chemical potential
• The electron that leaves because there is room
• The pressure that ionises
• The protons a star cannot afford

Every branch boltzmann-factor draws, and what checks it

• Collisions are easier than forces, and momentum is the reason
• The hill that gives it back, and the forces that do not
• The fluid that answers back
• Every minimum is a parabola
• What a system actually minimises
• The wall that moves while the ball is in flight
• The push that pays only for the hill
• The jump that does not get higher with size
• The ladder that lets go of the wall

Every branch energy-landscape draws, and what checks it

• The field that makes the other, and only while it is changing
• The magnet that falls slowly
• The rule that is two laws wearing one coat
• The coupling that is the same both ways
• The circuit that fights its own change
• The drag that falls as the magnet speeds up
• The coupling a resonance rescues
• The ring that jumps because its current is late
• The pan a better conductor will not heat

Every branch induction-loop draws, and what checks it

• The error that doubles on a schedule
• The last curve to go
• The fold that has to be there
• The map a dripping tap turns out to be
• The calm that is the ghost of a cycle
• The wrong orbit beside a right one
• The spring that swings when it was only bounced
• The swing that turns a step at a time
• The toss that is random without chaos

Every branch kam-tori draws, and what checks it

• The bend Newton got half right
• The delay that is not a bend
• The lens with no focal length
• The circle light cannot leave
• The half of the bend a slow body never feels
• The fifth image a galaxy hides
• The star whose far side can be seen
• The lens a long wave walks round
• The bend a moving planet gives

Every branch light-bending draws, and what checks it

• The angle that throws furthest, and why nobody notices
• The angle that drag moves
• Everywhere a throw can reach
• One curve answers every slope
• The best throw is a tangency
• The throw most likely to go in
• The ball thrown up that lands to the west
• The parabola that is the top of an ellipse
• The throw a spinning station bends

Every branch projectile-angles draws, and what checks it

• The correlation no instructions can produce
• The disagreement that one run settles
• The state that cannot be copied
• What two have they cannot give a third
• A link between two that never met
• The corner of Hilbert space that is ever visited
• The qubit that carries two bits
• The entangled pair a list of answers can imitate

Every branch bell-correlation draws, and what checks it