Crossword-Please Print Out

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            1.  In Star Wars Darthvader uses a red ______ (not a light saber).

            2.  A power plant gives this off ______ ( not gases).

            3.  A chemical that gives off light.

            4.  A negatively charged particle.

            5.  A form of heating.

            6.  To shine by reflection ( *Hint--> Starts with Ill_________).

            7.  The center of an something ---> Atom

            8.  A directed light ray ( not laser)

            9.  Swells on the ocean- or vibration.

            10. A source of light which is usually cooler than an incandescence source.

            11. To send out waves which are used in X-rays

            12. A positively charged particle in a nucleus of an atom.

             Across

            3. A ________ has neither mass nor electric charge, but posses energy and momentum.

          13. The opposite of a luminescence source is ________.

          14. Visible electromagnetic radiation is ________.

          15. Oxygen is an ______.

          16. An virtual image produced by using laser.

          17. Magnetism produced by an electric current.   

          18. To have given off something.

          19. A neutron is what ______?

          20. A neutral particle in an atom.

          21. To shine brightly and steadily, without a flame.

          22. Relating or originating to the sun.

          23. To deflect light by using a straight path is called "____________"