It consists of a light-tight box that has a single hole in one side. Light passes through the hole and creates an inverted image on the opposite side of the box. The Greek philosopher Aristotle, for example, described a pinhole camera in about 330 BC when he questioned how the image of the sun in the box remained circular even when the hole in the box was square. 2. Who created the first photograph? How was this done?
NT1310 Unit 9 Assignment 1 Transmitters LED Transmitter LEDs have a much lower power output than lasers and LED’s have a larger light output pattern. Which makes it harder to couple into fiber limiting the LED to be used with multimode fibers, LEDs have less bandwidth than a laser and are limited to operate up to about 250MHz or around 200Mbs. With the way LEDs are fabricated they are cheaper to make than lasers, they contain no hazardous material and can last up to 10,000 hours. LEDs have a very small broad output which causes them to suffer chromatic dispersion in fiber. The bulbs create less heat during use, which can lead to lower cooling costs and its green friendly, decreases amount of energy used by 5%.
Use the fact that the brightness of a point source, such as a star, varies inversely as the square of its distance from an observer to show that the space telescope can see about seven times farther than a ground-based telescope. This situation "Makes sense". The reason that this makes sense would be simply explained by stating that the closer you are to something the easier it is to see. If a ground telescope has to first see through clouds and the atmosphere to see specific stars. That would mean that the Hubble Telescope being in space would not have to work as hard as the ground telescope and also give a better view because of the distance situation.
The real density of aluminum is 2.70 grams, the density we found was 2.69 grams. This made the present error -0.37%. A couple sources of error we could have had are reading the measurements on the graduated cylinder and scale and also we could have inaccurately recorded the data. In order to get more accurate data one could use a more specific scale, tested a few more times, or been more specific about the pieces of aluminum they used. The experiment did meet the overall goal, which was getting close to, if not hitting, the density of 2.70 grams and we came close with less than -0.5% percent
IV. Materials V. Procedure VI. Observations/ Data; Lesson Three Collection and Analysis: A) Data Collection; 1. For the first plate, +pGLO (LB/amp), there was not a lot of growth on the plate, in comparison to the other groups and it did not glow under UV light. For the second plate, +pGLO (LB/amp/ara), there were even fewer colonies observed, unlike any of the other groups as well, and it did glow under UV light.
Answer: The movement of the sun will change the angle it has on the sky in 30 minutes, it is always moving from the east to the west, so in 30 minutes it would move more west, no matter at what time you make the experiment. (5 points) Score 2. You have two sun sticks. One is 2 m long; the other is 5 m long. You place a mark 1 m up from the ground on both sticks.
You might also have noticed that some light bounces off of the glass instead of passing through it – this is because no glass is perfectly transparent to light. Can you use this information to help explain why when it’s dark outside but bright inside (you’ve got the light on) you can see your reflection in the window? 4. The usual method of drawing a light ray is to mark two dots on the path of the light-ray, then remove the ray-box and complete the line. The problem is that the ray itself may actually be a little wide, so it is important that each of the dots is in the middle of the ray; if one is in the middle and the second is a little to one side, the resulting line will not be an accurate representation of the original light ray.
Light travels in straight lines When an object is held between a point source of light and a screen, a shadow is formed. If a line is drawn (representing a light ray) joining the light source, the top of the object, and the top of the shadow, this line is straight. 3. Light can be reflected When light strikes a surface, it can bounces back off that surface, Practically every surface reflects some light – if not, we would not be able to see colors. 4.
With the price of a CFL light bulb being set at a higher price than a regular incandescent light bulb the long lasting and lower energy will pay for its self. With a average household spending around ninety dollars more in the switch to CFl light bulbs but would save between four hundred and forty dollars to one thousand and five hundred dollars over a five year life span of bulbs purchased. Not only does the compact fluorescent light bulb a huge money and power saver in our nation’s economy but it also produces less mercury than regular light bulbs that can possibly pollute the world’s air and water. With regular bulbs producing around 4mg of mercury CFL bulbs can possibly produce as little as 1mg’s of mercury. Many positives come out of these new hybrid bulbs but many issues that Americans may have is that these new bulbs may not always fit all light fixtures as of now with also adding that the bulbs get dimmer over their lifetime.
How does a FLATBED SCANNER Work? The image source is placed on the glass plate and the cover is closed (although it is not necessary to do this). The inside of the cover in most scanners is flat white, although there exist some black ones, too. The reason to close the cover is that it provides a uniform background which the scanner software can use as a reference point for determining the size of the image source. However, many flatbed scanners allow the removing of the cover in order to scan a bulky object, such as a page in a thick book.