Answer:
1.33
Explanation:
Using the formula for destructive interference since the two reflected ray light waves from eyeglass should be made to cancel each other ( destructive interference) and also refractive index of air less than the refractive index of the film and both are less than the refractive index of the glass meaning the both reflected rays from the air and film will experience a phase change
n film = ( m + 0.5) ( λ / 2t)
since 2 t = ( m + 0.5) ( λ / n film)
where m is an integer, λ is wavelength, and t is thickness and n film is the refractive index of film
for effectiveness m = 0
n film = ( 0.5) ( 480 ÷ (2 × 90 ) ) = 1.33
Answer:
True. mark me as Brilliant
Answer:
option c) 0.88c is the correct answer
Explanation:
using the Lorrentz equation we have
where,
t = time taken to cover the distance
d = Distance
v = velocity
c = speed of light
given
d = 15 light years
Now,
or
or
or
or
or
or
<span>C. Field lines begin near the magnet’s north pole and extend toward its south pole.
Hope this helps!</span>
