PHI-WORD : Derive & Conquer

5. An instrument measuring atmospheric pressure.
6. The angle of incidence that produces an angle of refraction of 90 degrees is called the ______ angle.
7. Type of mathematics developed by Newton and others.
8. Slower media have ____ indices of refraction.
12. The filtering of light due to its orientation.
13. A wave with a frequency of 1 x 10^8 Hz.
17. A portion of a ferromagnetic material where the magnetic moments are aligned with one another because of interactions between molecules or atoms.
20. Particles of a medium vibrate perpendicularly to the direction of the motion of the wave.
21. A common measure of sound intensity.
22. How high or how low a sound is.
25. Nearest galaxy to earth.
26. A sound that results from the passage of air through restrictions of the oral cavity.
31. Moving or tending to move away from a centre.
32. Phenomenon that occurs when a vibrating system or external force drives another system to oscillate with greater amplitude at a specific preferential frequency.
34. Work done by a force of one newton when its point of application moves one metre in the direction of action of the force.
35. All substances have absolute indices of refraction greater than or equal to _____.

1. A unit of force in the CGS system that is equal to the force which generates a velocity of one centimeter per second acting on one gram for one second.
2. An instrument used to measure the expansion of solids and liquids when heated.
3. A ray that passes through the axis of an optical fiber.
4. The tendency of a liquid in a capillary tube or absorbent material to rise or fall as a result of surface tension.
9. The ability for an object to resist changes to it’s state of motion.
10. In this type of wave, the vibration is parallel to the direction the wave travels.
11. The number of crest or troughs of a wave that pass by over a certain amount of time.
14. Capable of having its shape changed permanently by means of applied mechanical force.
15. The distance from one crest to the other crest.
16. The change in the observed frequency of a wave when there is relative motion between the source and receiver of a wave.
18. Point on a standing wave where the energy is smallest.
19. This kind of interference occurs when a trough meets a trough.
23. A device used to measure a dose of ionising radiation.
24. The perpendicular distance from the axis of rotation to the point where the force is exerted.
27. Combination of transverse and longitudinal water waves.
28. A thermometer used at very low temperatures.
29. MECHANICS Theory Of interaction between light and matter.
30. Prefix denoted by 10^-24.
33. Either of two units of heat energy.