Answer:
The period of the telescope observe the light flashes is 1.2 sec.
(e) is correct option.
Step-by-step explanation:
Given that,
Flashes of light = 1 sec
Speed of telescope =0.6c
We need to calculate the period of the telescope observe the light flashes
Using formula of period

Put the value into the formula



Hence, The period of the telescope observe the light flashes is 1.2 sec.