Answer:
B. point on the surface directly above the earthquake
Explanation:
The earthquake involves the propagation of waves through the inner part of the earth due to natural or artificial processes. This majorly leads to the vibration of the earth crust of the affected region as the waves propagates. Thereby, causing sometimes the a violent break up of the surface of the earth from within.
Therefore, the focus of an earthquake is majorly called its epicenter, which is a point on the surface directly above the earthquake itself.
B. A wooden desktop is the answer because wood isn’t see through
Answer: 133.33nm
Explanation: refractive index, n = real depth/apparent depth
Oil thickness= real depth = 200nm
Wavelength from under the water = apparent depth = a
n = real depth/a
1.5 = 200/ a
a = 200/ 1.5
a = 133.33nm
Well u should know this 24 hours