Reference no: EM131389825
Q. 1 Why are electric light bulbs shaped the way they are? (any reasonable answer will be accepted)
Q. 2 One example of how shadows can be used to generate art was by Etienne de Silhouette who used to trace people's silhouettes (hence the name). His big problem was that the small candles he used weren't very bright. Why didn't he simply use a bigger light source in order to get more light?
Q. 3 In the lectures I showed a photograph of an astronaut. His visor allows some light to pass through the visor and some to be reflected. You cannot see the astronaut's face through his visor. Use a ray diagram to explain how he can still see you!
Q. 4 In the lectures I showed a photograph of a "sun pillar" produced by the sun setting over the ocean. Use a ray-tracing diagram to explain why the sun (a spherical light source) produces a stripe-shaped reflection.
Q. 5 An example where an optical trick was used in the theater is "Pepper's Ghost", where J.H. Pepper produced what appeared to a ghostly figure hovering above the stage next to an actor. Draw a ray diagram and explain a possible way that Pepper could have used a sheet of glass to do this (points will be awarded for clarity).
Q. 6 Mirror images show "left to right" reversal, making most words unreadable in a mirror! Write down three words that still make sense when reflected by a plane mirror. The reflected word need not be the same as the original.
Q. 7 In the picture below, two mirrors are positioned perpendicular to each other. When you look at the image of the clock, which way round do the hands rotate? Explain your answer in terms of reflection.
About how far did it travel to pluto in kilometers
: The fastest spacecraft ever launched. The New Horizons mission to Pluto had a long way to travel: about 40AU. Even though it's traveling at an average speed of about 20 km/sec, it took years to get there.
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Find the image distance
: Find the image distance, di using the thin-lens equation. 1/ di + 1/ do = 1/f. Is the image real or virtual
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Determine the plan using handbook h 108
: Determine the plan using Handbook H-108 if the time to failure is exponentially distributed. Items that fail during the test are not replaced.
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Determine the plan using handbook h 108
: Determine the plan using Handbook H-108 if the time to failure is exponentially distributed. Items that fail during the test are not replaced.
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Why are electric light bulbs shaped the way they are
: One example of how shadows can be used to generate art was by Etienne de Silhouette who used to trace people's silhouettes (hence the name). His big problem was that the small candles he used weren't very bright. Why didn't he simply use a bigger ..
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Determine the plan using handbook h 108
: Items that fail will be replaced immediately. Determine the plan using Handbook H-108, assuming that the time to failure is exponential.
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Determine the plan using handbook h 108
: The test should be terminated by 1200 hours. Items that fail will be replaced immediately. Determine the plan using Handbook H-108, assuming that the time to failure is exponential.
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Is the transistor functioning in cutoff or is re open
: In a voltage-divider biased npn transistor circuit, you measure VCC at the collector and an emitter voltage 0.7 V less than the base voltage. Is the transistor functioning in cutoff, or is RE open?
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Evaluate the financial risks
: Evaluate the financial risks associated with operating internationally. If your chosen company does not operate internationally, evaluate what the financial risks could be if they were to expand internationally
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