prism‚ usually made of glass‚ used to split beam of white light into its component colors. When light is refracted through a prism it is dispersed into its constituent colors‚ and the angle at which the light emerges from the prism depends upon its wavelength. A prism spectrometer can be used to measure the
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grooves per cm on a CD Theory review The groove spacing is also called the "track pitch". It is the distance between each track. the shorter the wavelength of the laser light they use the closer they can make the grooves and the more information they can get on the disk. Also notice however that the track pitch decreases more rapidly than the wavelength of the lasers in the above table‚ this is because you can also reduce the track pitch if you increase what is called the Numerical aperture of the
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directivity pattern is a result of the difference between the phase velocity of propagation of an electromagnetic wave in air and that in the lens material. Lens antennas are used in radar and metering equipment that operates in the centimeter wavelength range. A lens antenna consists of a lens proper and of a feed. The shape of the lens depends on the refractive index n (the ratio of the phase velocity of propagation of a radio wave in a vacuum to that in the lens). A decelerating lens antenna
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Wave Nature of Light Objective: The purpose of this lab is to investigate interference‚ otherwise known as the diffraction of light. A beam of light acts a wave‚ and we are able to use equations so calculate the wavelength of the light used. The diffraction of a straight edge demonstrates that light waves bend around straight edges‚ allowing light to enter an area of shadow. When waves are superposed‚ they reinforce each other when crests are in phase and cancel out when they are not in phase
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application of soap and water. 3) Chemistry in everyday life for kids can also include why vegetables are colored. Colored vegetables consist of chemical compounds called carotenoids which have an area known as the chromophore. It absorbs certain wavelengths of light and thus there are colored vegetables. 4) Food is cooked because of the steam that’s present either in the water added or that which is present inside the food items. 5) Onions make you cry due to the presence of sulfur in the
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Characteristics and Nature of Waves In physics‚ a wave is a disturbance that travels through space and time‚ usually accompanied by the transfer of energy. Waves travel and the wave motion transfers energy from one point to another‚ often with no permanent displacement of the particles of the medium—that is‚ with little or no associated mass transport. They consist‚ instead‚ of oscillations or vibrations around almost fixed locations. For example‚ a cork on rippling water will bob up and down
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analog signal without modulation using a low-pass channel. Broadband transmission means modulating a digital or an analog signal using a band-pass channel. 2. Optical signals have very high frequencies. A high frequency means a short wavelength because the wavelength is inversely proportional to the frequency ( = c/f)‚ where c is the propagation speed in the media. 3. The frequency domain of a voice signal is normally continuous because voice is a nonperiodic signal. 4. This is broadband transmission
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I. Purpose: To observe the colors produced when compounds are introduced into a flame and the electrons become excited. To estimate the wavelength of light produced‚ then calculate the frequency and energy of the light II. Safety: Standard safety procedures III. Chemical Inventory: |Chemical Name: |Hazards: | |Lithium Chloride
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SENSATION AND PERCEPTION APSY 382 Aug 27th‚ 2012 Chapter 1 Psychophysics – how we measure perception (loose definition) Sensation = unidimensional = varies in one way (sounds get louder or softer) Perception = multidimensional = varies in many ways (there are a lot of kinds of books) Perception – knowing the present Memory – knowing the past Thinking – knowing the future Cognition = the influence of perception‚ memory‚ and thinking Aug 29th‚ 2012 Basic principles of perception 1. Stimulation
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Lab to measure the speed of Sound Name: Nandu Pokhrel Jan 5th 2015 Abstract: The objective of this lab is to determine the speed of sound using the knowledge of waves and sounds. In this experiment you will learn how to measure the speed of sound by holding a vibrating tuning fork over an open tube of water
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