Amazing Science behind Popcorn Pop! - By Kishor Singh #shorts

5 Amazing Science Projects

Define science in short.

Dalbir Singh, a policeman, is 114 m behind a thief. Dalbir Singh runs 21 m and the thief 15 m in a minute. In what time will Dalbir Singh catch the thief?

Directions (For the items which follow) : In this Section you have Eight short passages. After each passage, you will find several questions based on the passage. First, read a passage, and then answer the questions based on it. You are required to select your answers based on the contents of the passage and opinion of the author only. PASSAGE-III I was at the shop early. He was standing behind the counter and as soon as I saw him, I knew that there would be some unpleasantness. Mr. Higson is never at his best unshaven, in slippers and braces and smoking on the empty stomach. The atmosphere of the little shop was heavy with the bitter odour of fresh newspaper print and ink : stacks of crisp newspapers and magazines lay neatly on the counter, and Higson and the boy were making up the daily mend. The overall atmosphere in the shop was

Directions (For the items which follow) : In this Section you have Eight short passages. After each passage, you will find several questions based on the passage. First, read a passage, and then answer the questions based on it. You are required to select your answers based on the contents of the passage and opinion of the author only. PASSAGE-III I was at the shop early. He was standing behind the counter and as soon as I saw him, I knew that there would be some unpleasantness. Mr. Higson is never at his best unshaven, in slippers and braces and smoking on the empty stomach. The atmosphere of the little shop was heavy with the bitter odour of fresh newspaper print and ink : stacks of crisp newspapers and magazines lay neatly on the counter, and Higson and the boy were making up the daily mend. At the shop Mr. Higson appeared in

The limit of resolution of a microscope is the least distance between two point objects which can be seen clearly and distinctively with it. For a naked eye, limit of resolution is about 10^(-4) m or 0.1 mm. The limit of resolution for a microscope is of the order of lambda/2 , where lambda is wavelength of light used. For an optical microscope , using visible light, limit of resolution is "500 nm"/2 =250 mm. This is 400 times smaller than naked eye. So the useful magnification produced by it is 400. Smaller is the limit of resolution, greater is the magnification that can be achieved. By using shorter wavelengths , we can improve resolution. For examination of a microorganism, much higher limit of resolution is needed, the Wave nature of electron provides a means for probes of very small size organisms. An electron beam accelerated by a high potential difference possess a very short wavelength. In an electron microscope magnetic lenses are used to control the path of electrons. The image of object is obtained on a fluorescent screen or on a photographic plate. The electron microscope with its high magnifying power and resolving power , is one of the most indispensable and powerful tool for research in science , medicine and industry. The working of an electron microscope uses properties of electrons related to

The limit of resolution of a microscope is the least distance between two point objects which can be seen clearly and distinctively with it. For a naked eye, limit of resolution is about 10^(-4) m or 0.1 mm. The limit of resolution for a microscope is of the order of lambda/2 , where lambda is wavelength of light used. For an optical microscope , using visible light, limit of resolution is "500 nm"/2 =250 mm. This is 400 times smaller than naked eye. So the useful magnification produced by it is 400. Smaller is the limit of resolution, greater is the magnification that can be achieved. By using shorter wavelengths , we can improve resolution. For examination of a microorganism, much higher limit of resolution is needed, the Wave nature of electron provides a means for probes of very small size organisms. An electron beam accelerated by a high potential difference possess a very short wavelength. In an electron microscope magnetic lenses are used to control the path of electrons. The image of object is obtained on a fluorescent screen or on a photographic plate. The electron microscope with its high magnifying power and resolving power , is one of the most indispensable and powerful tool for research in science , medicine and industry. The advantage of electron microscope over optical microscope is that

The limit of resolution of a microscope is the least distance between two point objects which can be seen clearly and distinctively with it. For a naked eye, limit of resolution is about 10^(-4) m or 0.1 mm. The limit of resolution for a microscope is of the order of lambda/2 , where lambda is wavelength of light used. For an optical microscope , using visible light, limit of resolution is "500 nm"/2 =250 mm. This is 400 times smaller than naked eye. So the useful magnification produced by it is 400. Smaller is the limit of resolution, greater is the magnification that can be achieved. By using shorter wavelengths , we can improve resolution. For examination of a microorganism, much higher limit of resolution is needed, the Wave nature of electron provides a means for probes of very small size organisms. An electron beam accelerated by a high potential difference possess a very short wavelength. In an electron microscope magnetic lenses are used to control the path of electrons. The image of object is obtained on a fluorescent screen or on a photographic plate. The electron microscope with its high magnifying power and resolving power , is one of the most indispensable and powerful tool for research in science , medicine and industry. For an electron beam accelerated through a high potential difference V, limit of resolution is proportional to

Precise measurements of physical quantities are a need of science. For example to escertain the speed of an aircraft, one must have an accurate methi=od to find its positions at closely separated instants of time. This was the actual motivation behind the discovery of radar in World War II. think of different examples in modern science where precise measurements of length, time, mass etc, arc needed. Also, whereever you can, give a quantitative idea of the precision needed.