Which of the following statements regarding Raman spectroscopy are correct? (Select 3 correct answers from the following 6 options.) Select one or more: O a. When a 633nm laser is used fluorescence can be a major problem. O b. Lasers from the uv, visible and near infrared can be used. O c. The Raman scattered radiation is substantially times weaker than the Rayleigh scattered radiation. O d. Optical fibres cannot be used in Raman systems. O e. The anti-Stokes scatter is more intense than the Stokes scatter. O f. Water produces a lot of Raman scatter and is not a useful solvent.

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A: mass of box = m = 10 kg co efficient of friction = 0.7 acceleration = a = 6 m/s2

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Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.