We rotated the ray table clockwise by increments of 10̊ again. We repeated the same measurements but instead with counterclockwise angles. From the two angles of refraction we were able to calculate the average angles of refraction. Finally, we aligned the flat side of the lens so that incoming light ray struck the cylindrical surface. We rotated the ray table until the refracted ray disappeared completely and only the reflected ray was visible.
Participants were then asked to name the ink color and their response times for each list were measured in seconds. The results showed that the stroop effect interference extended to color-related words, providing further evidence for the interference and costs of the automatic processes of attention.8/8 Introduction Although we are able to sense a huge amount of information, not all of it is processed. Through a process of selection known as attention, only some pieces of information are selected for further processing by cognitive resources. The reason why we need to reduce incoming information may be due to a limited capacity to process information. Kahneman (as cited in Edgar, 2007) explains it in the limited capacity theory of attention.
Fist name, last name Physics ### Lab: Rotational Equilibrium The purpose of this lab was to analyze the physical effects of torques on an object and all the factors that can influence the magnitude of its strength and force. In lecture, we learned that although the magnitude of the force can have a strong effect on the rotational velocity of an object, the location or displacement of that force can have an enormous impact on the force’s effectiveness to do work. In this experiment, we saw, first hand, how a small force can have as much of a dramatic impact on an object as a larger force if the displacement is right. The goal of this experiment was to balance a meter stick at its center of gravity using different weights on opposite ends of the stick. Making the left side our positive direction, and our right, the negative direction was essential in proving algebraically, the results of the experiment.
We can now explore the more complicated scenario of light traveling from one medium to another. Below is a diagram showing the path that the light travels. Here we know that the light is traveling from the initial point to the final but we are trying to find the x value (where it crosses the two mediums) that minimizes the time taken. If we look at this diagram it is clear that in general the total time that the beam travels to get from point x1,y1to point x2,y2 is: Tx=x-x12+y12v1+x2-x2+y12v2 If we consider Fermat’s principle of least time to be true then the true time taken is that for which the function is a minimum. To find this we take the derivative of T(x) and set it equal to zero.
Low Power Objective Lens • Low power objective lenses typically provide a 10x magnification and will have a yellow band around them. Low power objective lenses are usually rotated into place after the scanning objective lens and provide additional magnification of the specimen being studied. The low power lens is useful for observing a large group of cells under the microscope or gaining general information about the structure of a small organism. • sample should be examined with low power first when observing any sample for the first time under the microscope. Now if you want to focus on one particular region in the sample then you can step it up to high power lens.
Misaligning composite faces effects recognising in other races compared to one’s own race. 1 Abstract Own race face bias ORB is the phenomenon that occurs in humans ability to recognise one’s own race faces more easily than faces from another race. In this report we going to investigate if the ORB has any effect on the recognition of faces in pictures that are either aligned or misaligned. In our experiment we used 20 participants from two different races in a recognition test. They studied a series of aligned faces in the study phase and then after 3 min cross-word phase ,they were shown a series of new faces and were measured on their ability to recognise the faces.
Because the length of a pendulum L, and the square of the period of the pendulum T2 are directly proportional, we were able to determine g by calculating the slope of the T2 vs L graph. From our calculations, this value turned out to be 10.3m/s2, while the accepted value for the acceleration is 9.8m/s2. Percentage Difference = 10.3−9.8 9.8 = 5.10 % There are a few reasons for the small error in our estimation: 1. There was some uncertainty in measuring the length of the pendulum L.
), Greeks such as Aristotle and eucline wrote on naturally-occurring rudimentary pinhole cameras, for example light may travel through the slits of wicker baskets and the crossing of leaves The ancient Greek , however, believed that our eye emitted rays which enabled us to see. What enabled a much better understanding of the pinhole camera was the discovery that light enters the eye rather
Investigating the various phenomena which occur when monochromatic light undergoes diffraction Title: Determine the wavelength of a monochromatic light source (laser). Measure the groove spacing of a CD and the diameter of powder spores using diffractive methods. Aim: The aims of this experiment are to determine the wavelength of the monochromatic light source and to determine the groove spacing of a CD and the diameter of the Lycopodium powder. Introduction: There are three parts to this experiment in the first part a diffraction grating is used to diffract light from a laser (monochromatic source of light). By measuring the angles of diffraction and by calculating the grating spacing, the wavelength of the light may be calculated.
Newton’s Second Law Lab Purpose: The purpose of this experiment was to determine the relationships between mass, force and acceleration as well as to prove Newton’s second law Hypothesis: It was hypothesized that there would be an inverse relationship between acceleration and mass; as the value of the mass increased the acceleration decreased. As well it is hypothesized that there would be a direct relationship between the net force and acceleration; as the net force increases the acceleration increases as well. Materials & Method: The materials that were required to do the experiment were a metre stick; its purpose was to measure the amount of string that is going to be used to drag the cart. Next equipment needed for the lab was a dynamic cart; it was going to be dragged by the string with a mass on the other end and will find relationships between these two. Also string (about 75cm) was needed in this experiment which would help pull the cart with the help of the masses that were used.