Answer:
using Snells law
Oi = angle of incidence = 58.0°
ni = index of refraction of air = 1.0003
nr = index of refraction of glass = 1.47
c = speed of light in vacuum = 3 x 10^8 m/s
Or = angle of refraction = ?
ni(sinOi) = nR (sinOr)
ni( sinOi)/ nR = sinOr
arcsin(ni(sin0i))/nR = Or
arcsin( 1.0003(sin58.0)) / 1.47
Or = 35.25°
Explanation:
I hope this will help you
Periscope is a tube containing mirrors or prisms for seeing things which are otherwise not possible to see due to some obstacle. Two mirrors are aligned at 45 degrees through which light bounces off and enables the observer to see beyond the obstacle. This is specially used in submarines.
A kaleidoscope is an optical device which contains mirrors and colored glass pieces in a tube. When the tube is rotated, beautiful patterns are formed due to multiple reflections.
Answer:
Because they propagate due to presence of magnetic and electric field.
Explanation:
An Electromagnetic wave is a transversal wave conformed of an electric field perpendicular to a magnetic field.
Maxwell established that an electric field can generate a magnetic field and vice versa, which allows the propagation of the electromagnetic wave without a medium.
