Luminosity Lab Report

A stars luminosity is measured by the apparent magnitude and absolute magnitude of the star and the amount of the light that is being emitting from it’s surface.

14. Why do stars have different levels of brightness, and how does one describe their brightness as compared to one another?

Out of the four options, light-years measure the greatest distance. The distance in the other units would be too large. It is easier to read measurements when using a unit that can scale a larger area.

2. (5 pts) List and explain the names and affiliations of the various characters/stakeholders in this story – I’m looking for us to use the story to map out the complexities that are generally associated with solving public health puzzles – the stakeholders you list and explain here should apply to many of the cases we consider going forward.

The mean voltage of the battery terminals while connected to the identification resistors is presented in Figure ‎4 12. These samples have been pulled out from the voltage sensor of the PEB panel. The voltage decreased as expected from 12.53 to 12.5 during first 20 seconds of connection to the

The brightness needs to be equal to or greater than existing light technologies, such as incandescent and CFL. The lights should be well distributed over the area lighted by the fixture. Light output needs to remain constant over time. It should only decrease toward the end of the rated lifetime. Lifetimes can last 35,000 hours or 12 years, based on 8 hour use per

First we began by doing an inventory of the supplies in our lab drawer. We then inspected the glassware in the drawer for any cracks or chips. Next we identified

For the meter stick tests, when there is 20 centimeters off of the table, the pitch will be high, and will not vibrate for very long. For the next test, when there is 40 centimeters off of the table, the pitch will be lower and the meter stick will vibrate for a longer period of time. And when there is 60 centimeters off of the table, the pitch will be very low and will vibrate for a long time. So, as the length goes up, or gets longer,

Introduction: This episode of “Mythbusters, Let there be light” was influenced by a scene from a Hollywood movie “The Mummy.” Where they used sunlight as a source of light with a mirror system to enlighten an underground area. The myth was if mirror can be used to reflect sunlight to create illumination and enlightened an underground area for a safe passageway as shown in the movie. Adam and Jamie come up with some idea to test if this ancient illumination is really possible. They set up two benchmarks, first was to see how much amount of light the movie used to enlighten their underground space, and if the mirror does reflect that amount of light, and the second benchmark was to estimate the minimum amount of light a human eyes need in order

The maximum light intensity that the OSEPP sensor was able to detect was 4095 lux as can be seen in Figure 13. This was observed when the a flashlight was pointed directly at the sensor. The lowest light intensity value that the sensor was able to detect in this trial was 54 as can be seen as the lowest point in Figure 13.

I'm sure that there are many people in this world that own a flashlight. But do they really know which type and color is best? This experiment will do a fine job at answering that question and will leave nobody in doubt of which is the best flashlight to purchase.

This could be shown if another experiment was conducted by placing the source of light further away, recording the change in photosynthesis rate. A plant's photosynthesis rate and carbon dioxide uptake rate depends on the wavelength of the light that it is exposed to, white light is the combination of all the colors of the visible spectrum. Its varying wavelengths allow for the chloroplasts in the leaves to capture more energy. Although chlorophyll in plants are able to effectively absorb light that has a wavelength of 400-500 nanometers and 600-700 nanometers (which is blue and red coloured light respectively), white light would have a higher rate of photosynthesis or allow more carbon dioxide uptake for green plants. Since contains both of the most effective wavelengths of light.

The light source shines specific wavelengths of light through the flame that then hit the detector. Because specific wavelengths of light are absorbed by the sample, what actually reaches the detector is a portion of what was emitted by the source in atomic absorption spectroscopy. The source and the sample are matched in such a way that the chemical composition of the filament within the lamp contain some of the same types of atoms that is analyzed. In this specific case, the filament would be made of copper and lead and perhaps some other metals.

This report will discuss the advantages, disadvantages and details of both natural daylight and artificial lighting systems in terms of developing within a commercial property. The report provides detailed research and analysis concerning the subject topic in order to give a comprehensive view of various lighting types and methods. Light is an electromagnetic radiation visible to the human eye, the wavelengths visible to humans range between 380nm (nanometers) to 740nm. Light behaves as a wave - it undergoes reflection, refraction, and diffraction just like any wave would.

It is worth noting that all the light sources including LEDs are normally affected by the LLF. Some are affected more than others. The total amount of light delivered to any work plane can be reduced by even 80 percent. Some of the LED fixtures are somehow unique since they are only affected by the LLD and sometimes by the LATF. The LLD factor is set by the sources manufacturer. Most of the manufacturers usually publish this information in some lamp catalogs that include incandescent, HID, induction, LED sources and also Fluorescent. All of them have the LLD factor.