32. When a beam of white light passes perpendicularly through a flat pane of glass, it is not dispersed into a spectrum. Why not?
35. Light of what color is scattered most of atmosphere? Least?
39. Radio waves are able to diffract readily around buildings, as anybody with a portable radio receiver can verify. However, light waves, which are also electromagnetic waves, undergo no discernible diffraction around the buildings. Why not?
40. Conduct the following experiments.
? Conduct "A Scattering Experiment"
We can verify the origin of the blue sky by adding a few drops of milk to a glass of water and then shining light from a flashlight through the mixture. If we look at the glass from the side, perpendicular to light beam, the light scattered by the milk droplets will appear blue. If we look at the glass opposite the flashing towards the beam, it will have an orange tint.
Place a pencil in a clear glass of water so that a portion of it is in the water and a portion of it is out of the water. Look at the pencil from different angles and describe what you see.
? Use a CD or DVD and a strong light source (like a flashlight or a fairly focused lamp, but NOT a laser pointer) and shine the light on the surface of the disk at an angle and then view it from the other side. Adjust the position of item and the lighting in the room and see if you can see anything going on.
Post to the discussion below your findings to each of the experiments
42. When you look at your reflection in the inside, concave side of a spoon, your image appears upside down. Why? Discuss how your distance from the spoon and the degree of curvature of the spoon affects your image.© BrainMass Inc. brainmass.com October 24, 2018, 11:16 pm ad1c9bdddf
Discussions on the basic questions on various phenomenon in ray and wave optics with diagrams.
1. The wavelength spectrum of the radiation energy emitted from a system in thermal equilibrium is observes to have a maximum value which decreases with increasing temperature. Outline briefly the significance of this observation for quantum physics.
2. The “stopping potential” in a photoelectric cell depends only on the frequency v of the incident electromagnetic radiation and not on its intensity. Explain how the assumption that each photoelectron is emitted following the absorption of a single quantum of energy hv is consistent with this observation.
3. Write down the de Broglie equations relating the momentum and energy of free particle to, respectively, the wave number k and angular frequency w of the wave-function which describes the particle.
4. Write down the Heisenberg uncertainty Principle as it applies to the position x and momentum p of a particle moving in one dimension.
5. Estimate the minimum range of the momentum of a quark confined inside a proton size 10 ^ -15 m.
6. Explain briefly how the concept of wave-particle duality and the introduction of a wave packet for a particle satisfies the Uncertainty Principle.