Light entering the bubble directly travels a shorter path than light entering at a wider angle. This allows different wavelengths to undergo constructive and destructive interference, so different colors are perceived. The colors of a bubble are dependent on the thickness of the film. A bubble becomes thinner and thinner as it dries out (due to evaporation), before finally popping. As the surface film of the bubble becomes increasingly
Andrew Knapp Unit 7 Assignment 1. Refraction, Reflection, and Optics NT1310 2/18/2015 Refraction occurs when there is a change in direction of propagation of a wave due to a change in its transmission medium. Basically this is when light is bent due to the light waves passing through a substance such as water or glass. When this happens the light particles slow down or are absorbed into the material. A real life example of refraction would be when a pencil is placed halfway in a glass of water.
Intensity of light vs Distance Background information: Inverse square law: Inverse square law describes the relationship between the intensity of light and the distance from the light source. The further away you are from the light source, the less intense it will be. Light intensity (lux): It is a measure of the wavelength- weighted power emitted by a light source in a particular direction. Inversely proportionate: If a graph is inversely proportionate, it means the graph must be a straight line (y=mx+b or y=kX) and it must pass the origin (0,0). Attenuation: Weakening in force or intensity.
We will use coloured filters (first red and then continue in rainbow order) to gain coloured light. We will use slots to get a singular ray of light that we can shine down the angle of incidence for the perspix which we will have to keep the same as a control. For example the angle of incidence could be 30° because it has to be quite low so that it doesn’t cause total internal refraction. Then we will measure the refractive index that comes out of the perspix block from the normal line using a protractor. We will record the results in a results table (in the column heading measure it in °).
Hypothesis: I expected that the high-density Polethene would sustain more weight than the low density Polethene before braking for many reasons. Firstly, the high-density Polythene has many more monomers in the same area of plastic surface. The denser plastic the longer it will stretch before breaking. The Low-density Polethene has fewer monomers than the high density plastic and therefore has fewer bonds that can move more easily and can be stretched more freely. Another reason I believe that the low-density Polythene will break first is because the monomers are in straight lines and the high-density polymers overlap giving the material more strength.
The Pulfrich Pendulum; an Experimental Investigation Abstract This is an investigation into the Pulfrich Pendulum effect and the time that the dim eye lags behind the bright eye. Overall brightness was also investigated to find out whether this had any effect on this phenomenon and whether the time lag changed. A time lag was calculated for participants and recorded, the experiment was then repeated looking at overall brightness and a time lag recorded. The experiment confirmed that a time lag of 7.96ms & 9.04ms occurred during the Pulfrich effect and that overall brightness increased time lag by approx 1ms in comparison to darkness. Introduction The Pulfrich effect is a psycho-optical phenomenon wherein lateral motion of an object in the field of view is interpreted by the brain as having a depth component, due to differences in processing speed between images from the two eyes.
The number bubbles produced shows the affect of light energy to the rate of photosynthesis. Hypothesis As the distance of the light increase, the bubble produced will also increase. As the distance of the light decrease, the bubble produced will also decrease. The percentage of Sodium bicarbonate in the 200 mL water will affect the rate of oxygen bubbles in the water. Selecting variables Independent variable: • Distance of the lamp (cm) This variable needs to be changed to observe its affect on the rate of photosynthesis.
CHL 161 Laboratory Experiment 4 and 5 Molecular and Electronic Structure Ionic vs. Covalent Compounds and Water Objective: 1. The objective of the Molecular and Electronic Structure Lab was to determine the color of light each solution emits. We also had to identify unknown solutions according the color of light each solution emits. Objective: 2: The objective of the Ionic vs. Covalent Compounds was to determine the physical appearance, solubility and conductivity of compounds. We also have to determine if the compound is ionic or covalent based on our findings.
When the electron returns to a lower level, a photon with that energy difference is emitted. The peaks in the emission spectra are very sharp and known as line spectra. This emission spectra can be used in identification of elements because the spectra is different for each element. Materials: 1. Spectrum tubes (known and unknown) 2.
The intensity of the flash is when it extends a subject varies continuously with the flash’s sovereignty as well as how far the light has to travel. The furthest the subject is from the flash, the less light will grasp it in addition to the less light will be revealed from the subjects back toward the camera. When the flash fires, the ray of light will multiply as it moves father from the