# What is an apparent depth?

**apparent depth**. [?′pa·r?nt ′

**depth**] (optics) The

**depth**of the image of an object submerged in a transparent medium; it is reduced from the real

**depth**of the object by a factor equal to the relative index of refraction of the medium with respect to air.

Herein, what is meant by real depth and apparent depth?

**Apparent depth** and **real depth** - **definition** **Real Depth** is **actual** distance of an object beneath the surface, as would be measured by submerging a perfect ruler along with it. **Apparent depth** in a medium is the **depth** of an object in a denser medium as seen from the rarer medium. Its value is smaller than the **real depth**.

One may also ask, what causes apparent depth? **Apparent Depth** and Distortion This effect is due to the refraction of light rays as they traverse the boundary between water and air. In the following graphic, the chest appears to be closer to the surface than it actually is.

Herein, what is real apparent depth?

The **apparent depth** is the distance of the virtual image, I from the surface of the water. The **real depth** is the distance of the **real** object, O from the surface of the water.

What is the formula for apparent depth?

real **depthapparent depth**=hh′=tanθ′tanθ=n. For water, n is about 43 , so that the **apparent depth** is about 34 of the real **depth**.