Question

In the glass filled with water a coin placed at the bottom, if viewed in a skew angle the coin is found floating in the water
A) True
B) False

Answer 1

Skew angle: It is defined as the angle between perpendicular to the alignment of the bridge and the centerline of the pier.
Refraction of light: When light travels from one medium to another medium due to the change in the density of the medium the path of the light changes.
Refractive index: It is defined as the ratio of the speed of light in a vacuum and the speed of light in a given medium.

Laws of refraction:
First law: The incident ray, the refracted ray, and normal to the interface at the point of incidence all lie in the same plane.
Second law: It states that the ratio of the sine of the angle of incidence and the sine of the angle of refraction is constant for a given pair of media.

Complete step by step answer:
When a coin is placed in the glass containing water the light rays which are emitting from the coin changes its direction when it travels through the air medium outside the glass of water. The refractive index of glass is different from the refractive index of air medium; the density of glass is thicker than the density of air medium.

Hence, the correct option is $\left( {\text{A}} \right)$.

Note:
When light travels from a denser medium to the rarer medium the refraction of light occurs away from the normal.
On seeing the coin placed at the bottom of the container from the skew point, due to the change in the density of the medium the coin will look like it is floating in the water.
The apparent depth of the coin will rise and the coin will be seen as it is floating on the water from the skew point.