A laser of wavelength 1524.8 nm is split using a beamsplitter into two similar power beams. Using mirrors, the beams are aligned to approximately co-propagate with the same polarisation and they cross each other with a small angle of 23.66 degrees. In the crossing region transverse to the beams there is an optical standing wave (optical lattice) - what is the distance between successive bright (or dark) intensity zones in μm? [Cross-polarised beams have no standing wave. 0.3% Accuracy needed.]

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !

chemical energy --> gravitational potential energy --> kinetic energy --> elastic potential energy --> gravitational potential energy

explanation:

when emma starts the hike, the chemical energy stored in her body is used to climb up the mountain, and so she gains gravitational potential energy (because at the end, she will be at a higher height h above the ground). then she goes bungee jumping: as she falls, this gravitational potential energy is converted into kinetic energy (because her speed increases as she falls down), until the point when the rope stretches, and she stops moving. at that moment, all the kinetic energy is converted into elastic potential energy due to the stretching of the rope. then, this energy is released because the rope returns to its natural length, and emma gains a small increase in altitude , so she gains some gravitational potential energy.

it is the mirror/flat mirror

explanation: