# Why does my straw look bent in water?

## Why does my straw look bent in water?

Above the water, the light reflects from the straw through the air and glass to your eyes. But below, when the light also travels through water, the refraction causes the image of the straw to be in a slightly different location. To the brain, the straw appears broken (and bloated).

## Why does straw appear bent?

So as we look at the straw in the glass, the light from the top part of the straw travels straight to our eyes whereas the part of the straw that’s underwater has light that is refracted since it goes from air to water, back to air again, so the light travels to the eye at a slightly different angle therefore making …

Why do things appear bent in water?

Refraction occurs when light goes through a water surface since water has a refractive index of 1.33 and air has a refractive index of about 1. Looking at a straight object, such as a pencil in the figure here, which is placed at a slant, partially in the water, the object appears to bend at the water’s surface.

### Which of these explains why a straw in a glass of water often appears bent or broken?

Refraction causes the straw to appear broken. Explanation: The reason for the straw to break at the water’s surface is because of the process of refraction. Light travels at different speeds in different medium because of the varying densities.

### Why does a straw look bent in a glass of water for kids?

Light refracts (or bends) when it passes from water to air. The straw looks bent because you are seeing the bottom part through the water and air but the top part through the air only. Air has a refractive index of around 1.0003 while water has a refractive index of about 1.33.

Why was the straw place inside the wine glass?

The liquid rises in the straw, to exactly the same height as the liquid in the glass. That’s because the atmosphere is pushing down on the liquid in the glass. The atmosphere pushes the liquid in the glass up into the straw.

#### What is the bendy part of the straw called?

A bendable straw or “bendy straw” (known in the industry as an “articulated straw”) has a concertina-type hinge near the top for convenience. This variation was invented by Joseph Friedman in 1937.

#### Why does a straw look different in water?

Above the water, the light reflects from the straw through the air and glass to your eyes. But below, when the light also travels through water, the refraction causes the image of the straw to be in a slightly different location.

Why does a Spearfish straw look like it’s broken?

The water also acts as a type of magnifying lens, making the size of the straw seem larger than it actually is. To the brain, the straw appears broken (and bloated). That’s why spearfishing is so hard to master. From far away, the fish you are eyeing always looks nearer to the surface of the water than it actually is.

## How does light affect the shape of a straw?

Similar to this illusion, the light that reflects off the straw allows your visual system to process and identify its shape as it travels through mediums of varying densities. But as light passes from air into water, which is denser, it changes direction, or refracts.