| A | B |
|---|
| Angle of Incidence | The angle that a line makes with a line perpendicular to the surface at the point of incidence,  |
| Carrier Wave | An electromagnetic wave that can be modulated, as in frequency, amplitude, or phase, to transmit speech, music, images, or other signals.,  |
| Concave Lens | A lens that is thinner in the center than at the edges.,  |
| Double Bond | A chemical bond formed when two atoms share two pairs of electrons with each other.,  |
| Element | Is a pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus., .png) |
| Gamma Radiation | A form of nuclear radiation consisting of high- energy waves.,  |
| Incandescent Light | General name given to illumination that's produced from an electrically heated source, such as a lamp's tungsten wire filament.,  |
| Lanthanides | A group of elements in the first row of the rare earth elements in the periodic table.,  |
| Mechanical Wave | A wave that requires a medium through which they travel,  |
| Nuclear Energy | Energy release by a nuclear reaction, especially by fission or fusion.,  |
| Plasma | A state of matter in which atoms are stripped of their electrons and the nuclei are packed closely together,  |
| Rechargeable Battery | A battery in which the products of the electrochemical reaction can be changed back into reactants to be reused.,  |
| Sound Waves | Alternating layers of compressed and expanded air particles that spread out in all directions from a vibrating object.,  |
| Third Prong | The round prong of a plug which connects the metal shell of an appliance to the safety grounding wire of a building,  |
