5 Which of the following shows a possible sequence of moon
appearances?
А
One week later
One week later
B
One week later
D
one week later
o

Answer sample (c); // would be best because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest;

Lexy is correct because angle r is between the incident wave,  n  = 0, and a diffracted wave.