Depends on the angle the light ray hits the water.
No, a light ray does not bend if it enters a glass block perpendicularly.
When light travels from air to glass, it bends towards the normal due to the higher refractive index of glass. The ray diagram shows the incident ray coming from air, bending towards the normal at the air-glass interface, and then bending away from the normal as it exits the glass. This results in the light ray being refracted towards the surface normal in glass.
The emergent ray is the ray of light which passes through a denser medium(glass) to a rarer medium(air).
how can the path of a light ray be affected once it enters a nonzero angle with a greater index of refraction
It will not change. Glass slows light but does not change it frequency.
Index of retraction
The reason for the pole appearing bent when put inside a glass of water is refraction. When a ray of light travels through one medium to the other, it tends to bend or deviate from its original path. Thus a light ray in this case, travels from the air through water, and then again through air and reach the eyes. Thus, the light ray deviates from its original path causing this phenomenon.
it refracts closer to the medium
No, a light ray does not bend if it enters a glass block perpendicularly.
When a ray of light passes through a glass slab, it will undergo refraction. The light ray will bend towards the normal as it enters the glass slab, and then bend away from the normal as it exits the slab. The path of the light ray will be slightly shifted from its original direction.
When a ray of light is reflected off a mirror and into a glass of water, it undergoes both reflection and refraction. The light ray bounces off the mirror's surface and then bends as it enters the water due to the change in the medium's density. This causes the light ray to change direction and speed as it travels through the water.
When light is perpendicular to a glass slab, it passes through unaffected without any deviation in its path. This phenomenon is known as normal incidence, where the incident light ray and the refracted ray are along the same line.
Incident light ray
Spray water at the path of the laser and it should reveal the ray.
The light ray will refract twice as it enters and exits the water.
The light will be refracted towards the normal when it passes from glass to water, as water has a lower refractive index than glass. This means the light ray will bend towards the line that is perpendicular to the surface at the point of incidence.
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