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Physics, science of light 04

HERBY MATIMBA
Across
angle measured from the reflected ray to the surface normal(5,2,10)
is the ability of a solid material to undergo permanent deformation(10)
a measure of the rate of energy transfer over a unit of time(4)
the physical science of light waves(9)
a hypothetical structure connecting disparate points in spacetime(8)
interaction that occurs between particles with electric charge(16)
inner volume of a container(8)
an elementary particle of half-integer spin(7)
a wheel on an axle or shaft (6)
change of a solid into a liquid(7)
any basic unit of matter and energy(8)
a collision in which there is a loss of kinetic energy(10,9)
a piece of equipment that is used to measure the forces acting on an object(6,5)
Down
a force that acts between two surfaces that meet(8)
any species of atom that exists for a measurable period of time(7)
A force that changes the direction of an object towards you(4)
the electrode that positive current flows into from the outside(5)
quantity measured by a thermometer(11)
the quantity of visible light that is emitted in unit time per unit solid angle(8,8)
regions at the end of a magnet where the magnetic field is strongest(5,4)
spontaneous net movement(7)
subatomic particle that has the same mass as another particle(12)
the transfer of internal energy into or out(10)
amount of salt dissolved in a body of water(8)
a device that stores chemical energy and converts it to electrical energy(9)
distinct nuclear species (or nuclides) of the same chemical element(7)
a combination of two or more metals(5)