that particular Sunday evening. The climbers‚ John and Mary had reached the tops of the cliffs as the sun was setting. They looked over the town to one side and the water on the other. The whole scene appeared strikingly beautiful in the late evening light‚ for it was sunset. Their hearts began to fill with emotions as the vast open sky started to turn from a baby blue to an autumn red‚ the clouds changed from cotton white to a flaming yellow orange giving the clouds a fluorescent
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assessment criteria 5 and 6 The Photoelectric effect‚ and the Production of Light In 1887 Hertz discovered the photoelectric effect‚ where electrons were emitted from a zinc surface when illuminated with ultra-violet light. These electrons (called ‘photoelectrons’) were only emitted when the frequency of the ultra-violet light was above a certain value (called the ‘threshold frequency’). Criteria 5c Assume that ultra-violet light is falling onto a piece of zinc‚ and photoelectrons are being emitted
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The Effect of Light Intensity The effect of different light wavelengths was tested in the following experiment. The rate of photosynthesis can be affected depending on the light treatment it receives. With the aid of DPIP acting as NADPH in photosynthesis‚ it was possible to observe the reaction as it took place. Samples were created with dark‚ 24 cm‚ 30 cm‚ and 49 cm light treatments. The absorbance was measured in five-minute intervals for each sample and recorded in an appropriate table
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Light Lab Report Introduction: Without light‚ plants would not be able to carry out photosynthesis (McKenney‚ Peffley‚ and Wilmington 49). Photosynthesis is responsible for providing the plant with nutrients it needs to thrive and grow. Without the proper nutrients‚ it is difficult for a plant to continue to live. Therefore‚ photosynthesis is necessary for a plant’s vitality. The goal of this experiment is to observe and identify the impact that light has on a plant. Hypothesis: If light
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Light Intensity Experiment: For the light intensity experiment‚ our first set of data illustrated strange correlations between the three tubes placed in front of a light source‚ so the data provided in e-campus was used. The tube that was 24 cm away from the light had the greatest decrease in absorbance over the course of 20 minutes‚ followed by the 30 cm and then the 49 cm light apparatus. The tube that was placed in the dark (wrapped in foil) remained a dark blueish-green color whereas the tubes
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because blue light has a higher absorbance by plant photosynthetic pigments and has a higher energy wavelength than red light‚ we predicted that juniper needles placed in blue light would photosynthesize faster than juniper needles placed in red light. We measured the rate of change in CO2 concentration due to juniper needles. For each sample‚ we placed the needles into a chamber connected to the CO2 monitor and measured the rate of change of CO2 concentration for 10 minutes under red light and then
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Blackbody radiation is the electro-magnetic radiation emerging from a small hole in a perfectly black box containing electromagnetic radiation at a high temperature. Scientists were interested in setting standards for the electric and thus measured the distribution of the total electromagnetic energy in a black box among the different wavelengths of the light. But not until Max Planck‚ at the turn of the century‚ was a single mathematical formula for the observed distribution of the energy among
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watch and thought about what my dad would say if he was here. Now I look back and say that I couldn’t pass the test if it wasn’t for the watch. This watch has been a part of my life ever since. My watch is black like a storm night and it has a metal ring around its face. On the shiny black face behind the glass cover there is a hour hand and a minute hand. The hands move slowly like a snail. On the bottom of the face there are two grey circles with digital interface. The middle circle has a digital
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disadvantages of a light microscope and electron microscope? Some of the disadvantages of the light microscope include‚ that since it send light‚ the light waves are diffracted as they pass through the matter. Because of this‚ light microscopes can only produce clear images of objects to a magnification of about 1000 times. Another problem is that since most living cells are nearly transparent‚ you can’t see them. So you have to use dyes to stain them. The advantage of using a light microscope however
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The poem The Halo That Would Not Light sent me on a religious journey with the title itself. According to Merriam Webster‚ a halo is a circle of light that is shown in a religious painting‚ drawing‚ etc.‚ around the head of a holy figure (such as an angel‚ saint‚ or god). Which leads me to believe that there is a religious figure that this person is looking forward to coming but their halo will not light which means they never came. In the first couple of lines‚ “When‚ after many years‚ the raptor
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