Cyclic dienes added to alkene dienophiles also lead to two new form of stereoisomeric products‚ the endo and exo products (Kilway‚ “Lecture”). In cases where dienes and dienophiles align above one another‚ the endo product is formed (Hunt). The endo product will have two axial substituent groups (Kilway‚ “Lecture”). This formation typically forms the major product because it takes less kinetic energy to be formed due to secondary orbital interactions with the substituents in transition states (Hunt)
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Do you ever feel like someone is watching you when you walk past a mirror? That’s because we are always watching you. I’ve been hanging on the wall at the Capulet house for more than 15 years. In those years‚ I watched our young Juliet grow up into a fine woman‚ several servants come and go‚ and so many interested parties take place in this home like the one last night. I’ve seen enemies enter‚ revenge be sworn‚ and a forbidden love blossom. Capulet’s party last night was interesting to say the least
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2.1 Who invented the first colour wheel and how/why? The 1st colour wheel was brought by Isaac Newton. Isaac Newton halved white sunlight into red‚ orange‚ yellow‚ green‚ cyan‚ and blue rays; he then joined the two ends of the colour together to show the natural process of colours. Newton associated a colour with a note from the musical scale. 3.2.2 Explain how the colour wheel works? Colors are often associated with primary‚ secondary or tertiary colours . Primary colours are those that make every
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Refractive Index: Refractive Index formula is use to find the change of speed of light as it travels from air into glass. It measure how much light slows down when it enters denser medium such as glass. The formulae is written as: To find out the refractive index‚ substitute these into the equation; The speed of light travels in air is 3 x 10^8-1 The speed of light travels in glass is 2 x 10^8 ms^-1 Refractive Index (Glass): 3 x 10^8 / 2 x 10^8 = 1.5 When light enters glass‚ its reflective index
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Introduction: To do the lab exercises for this lesson‚ you need to know a little bit about light. White light consists of all the colors of the rainbow mixed together. Diffraction refers to various phenomena which occur when a wave encounters an obstacle. In classical physics‚ the diffraction phenomenon is described as the apparent bending of waves around small obstacles and the spreading out of waves past small openings. Isaac Newton thought that light must be a particle because particles of light
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Visual Perception Pictorial depth cues are what we use to create depth and distance on a 2D canvas or paper. Linear perspective is used when two parallel lines converge together and are perceived to come to a point into the distance. We perceive this in straight roads‚ railway tracks or hallways. This image displays linear perspective on the left side on the box as it is perceived to come together despite the fact that the lines are parallel. Interposition is used when an object sits in front
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Relation between image & object distance of lens & its focal length: lens equation. 1/f=1/do+1/di Law of refraction: n1sin0=n2sin02. Condition for multiple slit interference maximum: dsin0=mlambda Approach to optics treats light as a ray phenomenon: geometric optics Index of refraction for an optical material is- speed in light of vacuum:speed of light in material Relation between the refractive index‚ the two surface curvatures & the focal length of lens: lensmakers equation Snells law results
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FE1002 PHYSIC 2 Tutorial 1– [optic] 2007/2008 Semester 2 FE1002 Physic 2 Tutorial 1 – Optic QUESTION 1: light with a wavelength of 700nm is incident on the face of a fused quartz prism (n = 1.46 at 700nm)at an angle of 75˚ (with respect to the normal to the surface). The apex angle of the prism is 60.0˚. Calculate the a) b) c) d) angle of refraction at this first interface angle of incident at this second interface angle of refraction at the second interface and angle between the incident and
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Spherical Mirrors A spherical mirror is a mirror which has the shape of a piece cut out of a spherical surface. There are two types of spherical mirrors: concave‚ and convex. These are illustrated in Fig. 68. The most commonly occurring examples of concave mirrors are shaving mirrors and makeup mirrors. As is well-known‚ these types of mirrors magnify objects placed close to them. The most commonly occurring examples of convex mirrors are the passenger-side wing mirrors of cars. These type of mirrors
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Aherne-Williams Fibre-Optic Telecommunications Systems: Fibre-optic telecommunications is simply a method of transmitting information from one place to another extremely fast. This is done by shooting pulses of light through an optical fibre. Creating the optical signal involving the use of a transmitter‚ relaying the signal along the fiber‚ ensuring that the signal does not become too distorted or weak‚ receiving the optical signal‚ and converting it into an electrical signal. An optic-fibre is a small
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