"Physics Impossible": HTML5 Crossword

Across

1. The light having coherent waves with zero energy lost is (5)
4. the average wave length visible light (4)
5. The force of impact in short time is called (7)
6. The friction generates while the body is in motion (7)
8. when natural frequency is in phase with external force then the effect is called (9)
9. one J per sec is (4)
13. light has dual nature it has particle and (4)
14. The force between electron and proton is (18)
15. When disorderliness increases (7)

Down

2. The amount of solar energy reflected back to space is called (6)
3. Heat energy required to rise 1 degree Celsius temperature of unit mass (20)
7. the turning force is (6)
10. The component used in CCD sensor in a camera is (9)
11. Quantum energy is the product of Planck's constant and (9)
12. the light spectrum having doublet (6)