Answer:
option A
Explanation:
given,
light is incident on the plane surface at (i) = 55°
angle of refraction (r) = 37°
μ is the refractive index of the material
using Snell's law
The refractive index of the material is
hence, the correct answer is option A
Answer:
His average speed is 45000
The fibers can be shorten
Answer:
the ratio of the smallest division of main scale to the number of divisions of the vernier scale.
Explanation:
difference between the value of one main scale division and one vernier scale division