Difusión

The video tutorial explains diffusion in both biological and physical contexts. In biology, diffusion involves small molecules crossing cell membranes. In physics, diffusion refers to the reflection or refraction of radiation, such as light or sound, especially on uneven surfaces that scatter in various directions.

What is the primary mechanism by which small molecules move across cell membranes in biological systems?

• Diffusion

• Active transport

• Osmosis

• Facilitated diffusion

In the context of physics, what does diffusion primarily involve?

• Absorption of sound

• Reflection or refraction of radiation

• Transmission of light

• Conduction of heat

Which of the following is an example of diffusion in physics?

• Light scattering on a rough surface

• Heat spreading in a metal rod

• Sound echoing in a canyon

• Light bending through a prism

What happens to radiation when it encounters an uneven surface?

• It is focused into a single beam

• It is transmitted without change

• It is scattered in many directions

• It is absorbed completely

How does an uneven surface affect the direction of scattered radiation?

• It focuses the radiation

• It scatters the radiation uniformly

• It absorbs the radiation

• It scatters the radiation in multiple directions