Suggested languages for you:

Americas

Europe

Q14CQ

Expert-verifiedFound in: Page 955

Book edition
1st Edition

Author(s)
Paul Peter Urone

Pages
1272 pages

ISBN
9781938168000

**Geometric optics describes the interaction of light with macroscopic objects. Why, then, is it correct to use geometric optics to analyse a microscope’s image?**

We use geometric optics approximation because the size of the object is much larger than the wavelength of light.

**One approximation that geometric optics makes is that the waves (rays) travel in straight lines until they hit a surface. When the ray encounters a surface it can either bounce back (reflect) or bend (refract) but then continues to travel in a straight line.**

The size of the object we see in the microscope is of the order of $\mu m\left({10}^{-6}m\right)$. The wavelength of the light used in the microscope is of the order of few 100 nm . So the wavelength of the light is much smaller than the size of the object, hence we can use the geometrical optics approximation.

94% of StudySmarter users get better grades.

Sign up for free