Lexy and Jin study the diagram shown.
Which best explains who is correct?
n
=
2
0
Lexy is correct because angle R is between the incident
wave, n = 0, and a diffracted wave.
Lexy is correct because angle R includes the diffracted
wave at n = 1.
Jin is correct because angle S is measured from the
barrier and includes n = 2, the wave that has the most
diffraction.
Jin is correct because angle S is between the dimmest
order bands, n = 1 and n = 2.
n=0
Lexy says that the diffraction angle is the one labeled R. and
Jin says that the diffraction angle is the one labeled S.

a. are

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.