3. The figure below shows the motion of a car. It starts from the origin, O travels 8m towards the east and then 12m towards the west.
D
8m.
X
X-8
12m. w
()What is the net displacement D from the origin to the final position?
(ii) What is the total distance travelled by the car?

What are the phases shown in a and d called?

Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?

Which of the following list the divisions of the geologic time scale in order from longest to shortest