# Why does pencil look bigger in water?

## Why does pencil look bigger in water?

The curved surface causes the light rays to bend slightly outward, like the spreading of a fan, as they pass through. That widens the image of the pencil that reaches your eye. It is the same “magnifying lens” phenomenon that makes things look fatter when viewed through a glass of water.

## Why do things appear bigger in water?

Since air has an index of refraction of essentially 1 and water has an index of refraction of 1.33 the angle from which the rays of light reach your eyes is larger than the angle they would in air. This makes the angular size larger to your eyes which makes the object look larger relative to how they would look in air.

Why does a pencil stick placed in water filled with glass look bigger?

Because the light can’t travel as quickly in the water as it does in the air, the light bends around the pencil, causing it to look bent in the water. Basically, the light refraction gives the pencil a slight magnifying effect, which makes the angle appear bigger than it actually is, causing the pencil to look crooked.

### What happens when a pencil is partly immersed in water?

Rays of light from the tip (B) of the pencil bend away from the normal as they go from water to air. The refracted appear to come from point B’. Thus the immersed portion of a pencil in water appears as CB’. Hence, the pencil appears to bent at the water surface.

### What happened to the pencil or pen after placing in the water?

As you sight at the portion of the pencil that was submerged in the water, light travels from water to air (or from water to glass to air). This light ray changes medium and subsequently undergoes refraction. As a result, the image of the pencil appears to be broken.

Why do things look magnified in water?

Did you see how objects appear larger when looked at through a water drop? The surface of a water drop curves outward to make a dome. This outward, or convex, curvature bends light rays inward. The result is an enlarged image on the retina of your eye.

## What is it called when something looks bigger in water?

This bending of light is called refraction.

## Why does stick look bent in water?

The stick looks like it bends! This is due to light refraction. Light refraction is caused when the ray of light travels through different mediums and slows down or speeds up. In the case of this stick in the pool, water and air are two different mediums.

Why does a pencil immersed in water appears bent and short?

A pencil placed in water appears to be bent because of refraction of light. The refraction causes an apparent shift in the position of the part of the pencil within the water. If water is replaced by another liquid which is optically more dense than water, then the bending of the pencil will increase.

### Why does a pencil partly immersed in water appear to be displaced at the interface of air and water?

As water is a denser medium with respect to air, light rays bend towards the normal. When this bent light reaches the eye, the pencil appears to be displaced or distorted.

### What happens when you look at a pencil in water?

This visual distortion is witnessed if you look at a pencil submerged in a glass half-filled with water. As you sight through the side of the glass at the portion of the pencil located above the water’s surface, light travels directly from the pencil to your eye. Since this light does not change medium, it will not refract.

How is the image of a pencil affected by refraction?

This light ray changes medium and subsequently undergoes refraction. As a result, the image of the pencil appears to be broken. Furthermore, the portion of the pencil that is submerged in water appears to be wider than the portion of the pencil that is not submerged. These visual distortions are explained by the refraction of light.

## What makes a pencil a writing or drawing implement?

A pencil is a writing or drawing implement with a solid pigment core encased in a sleeve, barrel, or shaft that prevents breaking the core or marking a user’s hand. Pencils create marks by physical abrasion, leaving a trail of solid core material that adheres to a sheet of paper or other surface.

## Why does an object appear to be bigger inside water, when?

Anyone who has used a diving mask under water will be aware of this. When the flat water surface is close to the eye, then rays entering the eye at an angle have passed through the air/water interface and have been refracted towards the eye. This increases the included angle from the perceived object and hence it appears larger.