Related Experiment Video
Updated: Jan 29, 2026

Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
Probing helium interfaces with light scattering: from fluid mechanics to statistical physics
1Institut Néel, CNRS-UJF, BP 166, 38042 Grenoble-Cedex 9, France. pierre-etienne.wolf@grenoble.cnrs.fr
Abstract:
We have investigated the formation of helium droplets in two physical situations. In the first one, droplets are atomised from superfluid or normal liquid by a fast helium vapour flow. In the second, droplets of normal liquid are formed inside porous glasses during the process of helium condensation. The context, aims, and results of these experiments are reviewed, with focus on the specificity of light scattering by helium. In particular, we discuss how, for different reasons, the closeness to unity of the index of refraction of helium allows in both cases to minimise the problem of multiple scattering and obtain results which it would not be possible to get using other fluids.
Related Concept Videos
Dimensionless Groups in Fluid Mechanics
Statistical Significance
Physical and Chemical Properties of Matter
Protein-protein Interfaces
Probability in Statistics
An example of a simple event is a coin toss. The result of a coin toss is either a head or a tail. Here, head and tail are two simple events. These two simple events make up the sample space. Further, the probability of an event occurring falls within the range of 0 to 1. The probability of an...
Introduction to Statistics
In statistics, the collection of individuals or objects under study is called population. The idea of sampling is to select a portion of the larger population...

