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- Light features packets of energy known as photons. Light travels in the form of a wave when it travels. The light speed is equal to 186,282 miles per second. The electromagnetic spectrum features an entire range of all possible frequencies of radiation. When white light passes through a prism, it disperses.
Questions and model answers on Light for the Cambridge (CIE) IGCSE Physics syllabus, written by the Physics experts at Save My Exams.
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Here is an excerpt from Galileo's report of his attempt to determine the speed of light in a vacuum.Let each of two persons take a light contained in a lantern, or other receptacle, such that by th...Use Rømer's method and Rømer's numbers to determine the speed of light in a vacuum. If you're comfortable reading 17th century French, here's the paragraph that reports Rømer's measurement of a 22...A common measure of astronomical distances is the light year. This is the distance a beam of light would travel in a vacuum in one year. Determine the size of a light year in meters.The Speed of Dark What if one fine evening, as the Sun was setting and a full moon was rising, the Sun suddenly quit emitting light?A common measure of astronomical distances is the light year. This is the distance a beam of light would travel in a vacuum in one year (about 10 trillion kilometers). As an exercise calculate the...Cutting lasers now exist that emit pulses of laser light so brief that they must be measured in femtoseconds. One particular femtosecond laser emits radiation with a wavelength of 1053 nm for only...Read the following passage from the Lunar and Planetary Institute.The Laser Ranging Retroreflector experiment was deployed on Apollo 11, 14, and 15. It consists of a series of corner-cube reflector...Visible light ranges in wavelength from 400 nm (deep violet) to 700 nm (dull red). Compute the corresponding range of frequencies?A common measure of astronomical distances is the light year. This is the distance a beam of light would travel in a vacuum in one year. For smaller distances I would like to propose an alternate u...Determine the one-way transit time for a signal received on Earth today if it originated from…Calculate the "round trip light time" for the following astronomical objects. That is, how long would it take a signal to travel from the Earth to the object and back?Physics Concept Questions And Answers. Light Energy Questions. Light is a form of energy which can be seen in the form of visible light. Light features packets of energy known as photons. Light travels in the form of a wave when it travels. The light speed is equal to 186,282 miles per second.
Light is refracted as it enters and leaves a diamond. The diagram shows a ray of light entering a diamond. normal. diamond . air (a) On the diagram, label the angle of incidence . i. and the angle of refraction . r. (b) State what happens to the speed of the light as it enters the diamond.
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Properties of light: Reflection of light: Each light obeys the law of reflection, which either stipulates that the angle of incidence equivalent to the angle of reflection. Refraction of light: It occurs whenever a light ray's velocity fluctuates even though it travels from one medium to another one.
This collection of problem sets and problems target student ability to use wave principles and equations to solve physics word problems associated with light speed, frequency, wavelength, illuminance, the Doppler shift, and two-point source interference.
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Light rays diverging from a point at an angle theta are incident on a mirror at two different places and their reflected rays diverge. One ray hits at an angle theta one from the normal, and reflects at the same angle theta one on the other side of the normal.
