Sound - Multiple Choice Test

Question 1
Question: When a wave travels through a medium ______.
1. particles are transferred from one place to another
2. energy is transferred in a periodic manner
3. energy is transferred at a constant speed
4. none of the above statements is applicable
Answer: 3

The dual nature of the electron

Wave-Particle Duality/The Two-Slit Experiment/Electrons:
According to classical physics, electrons should behave like particles - the travel in straight lines and do not curve in flight unless acted on by an external agent, like a magnetic field. In this model, if we fire a beam of electrons through a double slit onto a detector, we should get two bands of "hits", much as you would get if you fired a machine gun at the side of a house with two windows - you would get two areas of bullet-marked wall inside, and the rest would be intact.

Double Slit Interference

Helium-Neon Laser

Atomic spectra

To solve the puzzle of the atomic structure, we must study the atomic emission spectraWhite light is not actually white – it consists of many different colors. The composition of light – its spectrum – is studied by a device called a spectrometer

Diffraction grating

When there is a need to separate light of different wavelengths with high resolution, then a diffraction grating is most often the tool of choice. This "super Prism" aspect of the diffraction grating leads to application for measuring Atomic Spectra in both laboratory instruments and telescopes.

Refraction