We know

How he find:-
The owner will measure speed of light through the index(Diamond or rutile).Then using calculations he fill find which is the velocity of diamond or rutile
<h3> For diamond</h3>





<h3>For rutile</h3>





D. Transverse wave
Hope it's correct and helps uh.
Answer:
Reflective
Explanation:
The radiation pressure of the wave that totally absorbed is given by;

and While the radiation pressure of the wave totally reflected is given by;

Now compare the two-equation you can clearly see that the pressure due to reflection is larger than absorption therefore the sail should be reflective.
Answer:
Explanation:
Because friction is always present, the actual mechanical advantage of a machine is always less than the ideal mechanical advantage.