If `C` the velocity of light, which of the following is correct?

From this velocity-time graph, which of the following is correct?

P: Light ray passing along the principal axis is undeviated. Q: Light ray passing through the focus is undeviated. Which of the following is correct? A) Both P,Q are correct , B) Both P,Q are incorrect C) P is correct, Q is incorrect , D) P is incorrect, Q is correct.

P : Light ray passing along the principal axis is undeviated. Q : Light ray passing through the focus is undeviated. Which of the following is correct? A) Both P,Q are correct ," B) Both P,Q are incorrect C) P is correct, Q" is incorrect ," D) P" is incorrect, Q" is correct

V_(V),V_(R ),V_(G) are the velocities of violet, red and green lights respectively, passing through a prism after dispersion of white light. Which among the following is a correct relation ?

Plot of Maxwell's distribution of velocities is given below: which of following is correct ?

If an object moves with constant velocity then which one of the following statements is NOT correct?