), 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
Once the zinc was added slowly to the solution, a gas was released and the solution began to change colors. The colors that occurred were light blue to light grey, to a clear blue, back to a dark blue, then grey color. Once the stirring process ended, the solution was slightly blue and not colorless. There were solids in the bottom. The reaction that occurred with this step was displacement and metathesis in the form of gas formation.
What are the identities of the substances found after electrolysis and heating? The identities of the substances found were Iodine, Iodide ion (I-), Triodide ion(I3-), Zinc metal and Zinc ion(Zn2+) Post Lab questions: 1. What did this experiment convincingly show about the composition of the white solid? I put that the experiment showed us the white substance was comprised of Zinc ions and iodide ions, and that the two ions and be separated back into their respective elements 2. During the electrolysis, a gray solid formed on the negative wire of the battery and the dark red solution formed at the positive wire of the batter.
The first form of a camera was the “camera obscura”, a small windowless box with pinholes on each side which creates an image of the scene outside on a canvas inside the camera ("Photography"). In 1824, Claude and Joseph Nicephore Niepce developed "heliography" which is a process using lithographic stones placed in a camera and exposed for eight hours to sunlight. Five years after heliography, Joseph Nicephore Niepce and Louis Daguerre joined forces to discover ways to improve and preserve these images. This process later became known as the "daguerreotype" and is achieved by coating a copper plate with silver iodide and exposing it to bright light for thirty minutes ("Photography"). Clearly, this system reduced exposure time immensely and allowed it to be preserved for much longer as well.
There no longer had to be big and bulky sound equipment, or a large and immobile camera, which allowed for a more intimate filming experience. As a result this generated different styles and opinions on how documentaries should be shot, and how the truth could ultimately be revealed. Direct Cinema advocates minimal intervention from the director, in order to capture the reality and represent it truthfully. It is the fly on the wall style that captures life unaware, and allows for the social actors to speak and interact freely without any restrictions or directions placed on them by the film director. (Rosenthal, Alan., John Corner.)
Aim: To determine the presence of the cations Na+, K+, NH4+, Ag+, Cu2+ and Bi3+ in the solution under analysis. Procedure: Please refer to page 26-27 of CHM152/154/2252 Laboratory Manual. Results: Procedure No and Ion Test Reagent or Technique Evidence of Chemical Change Chemical(s) Responsible for Observation Equation(s) for Observed Reaction 1. Na+ Perform flame test by dipping a test loop in test solution and putting in Bunsen flame after cleaning the loop with HCl(aq) A brilliant yellow persistent flame occurs Presence of sodium in the test solution - 2. K+ Perform flame test by dipping a test loop in test solution and putting in Bunsen flame after cleaning the loop with HCl(aq).
By measuring the angles of diffraction and by calculating the grating spacing, the wavelength of the light may be calculated. The light source used in the experiment should be a monochromatic light source as the experiment requires light of a single wavelength in order for the wavelength to be calculated. The second part of the experiment demonstrates how to determine the measurement of the groove spacing of a CD. The CD is used as a reflective grating; the light is reflected from the surface of the cd some of the reflected angles will give rise to constructive maxima, similar to a diffraction grating. The last part of the experiment is to determine the measurement of the diameter of powder spores by passing a monochromatic light source through a circular aperture and producing a diffraction pattern of concentric rings.
Cortical implants offer another means of restoring visual function by placing a device that interfaces directly with the brain. This is advantageous since it does not require an intact optic nerve and hence has a wider range of diseases
The disadvantage of photography is some are not selected, do not show the correct distance, it may be distorted and technique errors could occur while shooting the picture, too much detail may distract viewers of photograph and some cameras might not pick up small detail. (Orthmann and Hess. p47) The advantage of digital is that the images can be sent as an email attachment, some digital cameras can record technical information about the picture, you will have no problem with
When you zoom in or out on an image, does the actual size of the image change? (1.0 points) No, only your view of the image does. 5. What keyboard key can you press to limit the