1 00:00:00,370 --> 00:00:05,370 Hello! Have you ever wondered why we use different spectrums and colors to see the Sun? 2 00:00:05,370 --> 00:00:09,369 And how can we study the Sun's rotational period with it? 3 00:00:09,369 --> 00:00:13,369 What is the use of observing sunspots or solar flares? 4 00:00:13,369 --> 00:00:17,370 The sunspots of the Sun are used to measure the rotational period of the Sun. 5 00:00:17,370 --> 00:00:23,370 Using different spectrums or colors, we can observe the sunspots and understand the spectrum. 6 00:00:23,370 --> 00:00:27,370 As a quick introduction, we are going to introduce the light spectrums. 7 00:00:27,370 --> 00:00:32,969 The celestial objects radiate in wavelengths of the spectrum, but our eyes only see a very 8 00:00:32,969 --> 00:00:34,549 little part of them. 9 00:00:34,549 --> 00:00:38,689 The infrared spectrum of the light was discovered in the 1800s. 10 00:00:38,689 --> 00:00:43,509 This spectrum emits energy in longer length waves since they have less temperature. 11 00:00:43,509 --> 00:00:47,710 With the ultraviolet spectrum, this happens the other way around, and it is harmful for 12 00:00:47,710 --> 00:00:49,390 living things. 13 00:00:49,390 --> 00:00:54,369 X and gamma rays are also very energetic and are released by black holes or collisions. 14 00:00:54,369 --> 00:00:59,070 The sun emits infrared and ultraviolet rays, which is partially why we see the sun is yellow 15 00:00:59,070 --> 00:01:01,789 when it is actually in the green wavelength. 16 00:01:01,789 --> 00:01:05,650 Blue light scatters more efficiently than red light in the atmosphere, so we perceive 17 00:01:05,650 --> 00:01:08,329 the red light more. 18 00:01:08,329 --> 00:01:10,129 Materials and methods. 19 00:01:10,129 --> 00:01:15,129 We performed three experiments to see the light, spectrum, and its colors. 20 00:01:15,129 --> 00:01:16,810 A spectrum detector. 21 00:01:16,810 --> 00:01:20,129 We used a box of cereals, CD, and scissors. 22 00:01:20,129 --> 00:01:24,950 First, you cut the CD and paste it in the bottom of the box. 23 00:01:25,530 --> 00:01:31,730 Then, you make a hole in one wall and you make a small hole in the other wall so that the light can enter through it. 24 00:01:32,129 --> 00:01:39,310 Finally, you look through the bigger hole and you will see the colors of the spectrum in the CD, which is usually a colorful rainbow. 25 00:01:40,310 --> 00:01:41,609 A light dispenser. 26 00:01:42,170 --> 00:01:44,650 We used a silicon bar and a lantern. 27 00:01:44,650 --> 00:01:52,790 You just have to place the light of the lantern in the end of the silicon bar and watch the colors form along it. 28 00:01:53,349 --> 00:02:00,730 It will be reddish closer to the light while the cooler colors disperse and are more visible along the end. 29 00:02:02,069 --> 00:02:03,390 The theory of color. 30 00:02:03,769 --> 00:02:12,710 We used three rolls of toilet paper, three colored transparent paper, one blue, one red and one green and three lights. 31 00:02:13,210 --> 00:02:21,270 When we place the three lights with the colors, they demonstrate that the color theory is correct, forming white in the middle. 32 00:02:22,189 --> 00:02:24,569 And now we will briefly explain the results of our experiments. 33 00:02:25,229 --> 00:02:27,030 The first one was the spectrum detector. 34 00:02:27,750 --> 00:02:31,509 Celestial objects radiate at many wavelengths of the laser magnetic spectrum, 35 00:02:31,509 --> 00:02:35,250 but the human eye can only see a very small part of it, the visible region. 36 00:02:35,770 --> 00:02:38,129 That is what we are trying to appreciate with this experiment. 37 00:02:39,110 --> 00:02:42,889 The redder parts correspond to the infrared radio and microwave spectrum, 38 00:02:43,229 --> 00:02:46,830 while the cooler parts correspond to UV, X and gamma rays, respectively. 39 00:02:47,469 --> 00:02:50,009 The second experiment was a light disperser. 40 00:02:50,490 --> 00:02:53,530 Once the silicon bar is placed on the flashlight of the phone, 41 00:02:53,669 --> 00:02:59,069 we can see the blue photons scatter quickly, and the light that remains is yellow, and later even red. 42 00:02:59,889 --> 00:03:03,629 The theory of color. All bodies are measured according to their temperature. 43 00:03:03,629 --> 00:03:10,629 In this experiment, what we are trying to learn is how we can see the white color of the sun by using different frequencies of the spectrum. 44 00:03:10,629 --> 00:03:11,629 Conclusion 45 00:03:11,629 --> 00:03:18,629 While doing this project, we have learned that using different tools we can differentiate a wide variety of things about the sun. 46 00:03:18,629 --> 00:03:21,629 Not all the light we can see is all there is. 47 00:03:21,629 --> 00:03:24,629 Many wavelengths are not visible to the human eye. 48 00:03:24,629 --> 00:03:30,629 The sun emits more than what we see, and even the light we see sometimes is deceptive. 49 00:03:30,629 --> 00:03:36,629 The rotational period of the Sun is around 27.26 days. 50 00:03:36,629 --> 00:03:41,629 To know this, we have performed some calculations with some spots images, 51 00:03:41,629 --> 00:03:47,629 that consist of dividing data between two days and positions of the Sun spots. 52 00:03:47,629 --> 00:03:51,629 The tool we used calculates the time difference between two spots, 53 00:03:51,629 --> 00:03:57,629 so this way we know how much time it takes for the Sun to complete a rotation. 54 00:03:57,629 --> 00:04:03,469 Analyzing its rotation, we can see it is much slower than most of the planets in the Solar System, 55 00:04:03,469 --> 00:04:06,530 which are around Earth's speed of rotation. 56 00:04:06,530 --> 00:04:09,389 Only Venus and Mercury are slower. 57 00:04:09,389 --> 00:04:15,710 The differing spectrums of light led us to study the Sun's rotational period more efficiently 58 00:04:15,710 --> 00:04:22,269 since we can study change in the Sun with different images taken with different wavelengths. 59 00:04:22,269 --> 00:04:28,870 be discovering something new in its sunspots or solar flares with land-based and Earth-orbiting 60 00:04:28,870 --> 00:04:31,370 solar telescopes. 61 00:04:31,370 --> 00:04:37,269 As we can see, color and light are very connected and one complements the other. 62 00:04:37,269 --> 00:04:43,970 After all, color and light are everywhere around us and we are constantly experimenting 63 00:04:43,970 --> 00:04:45,370 with them both. 64 00:04:45,370 --> 00:04:47,670 Isn't it fascinating?