Why do lasers produce an intense coherent beam of light?
Lasers produce an intense coherent beam of light because the waves have the same frequency, are in phase with each other and have a low divergence.
LB
Related Physics GCSE answers
All answers ▸A person swims from a depth of 0.5m to 1.7m below the surface of the sea. Denisty Sea Water = 1030 kg/m^3. g=Gravitational Field Strength = 9.8 N/kg. Calculate the change in pressure on the swimmer and give the unit.
If Max weighed 17.2 N on Ceres (gravitational field strength of 0.27 N/kg), then what would she weigh on Earth. Give your answer to 3 s.f. and state your units.
What types of radiation are there?
What are the differences between microwaves and radio waves? How does this effect what we use them for?