A physicist at a fireworks display times the lag between seeing an explosion and hearing its sound, and finds it to be 0.600 s. (Enter your answers to at least four decimal places. Use the following relationship between Kelvin and Celsius: T(K) = T(°C) + 273.15.) (a) How far away (in m) is the explosion if air temperature is 24.0°C and if you neglect the time taken for light 207.3289 x m (b) Calculate the distance to the explosion (in m) taking the speed of light into account. Note that this distance 207.3292 m reach the physicist? negligibly greater.

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Q: How many nanoseconds does it take light to travel a distance of 6.50 km in a vacuum?

A: Distance travelled,  Speed of light,    The time taken can be calculated from the expression

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A: Given Reflected beam of light takes a time (t) = 2.56 seconds

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Q: The speed (V) of light in any transparent material is less than the speed of light c in a vacuum: V…

A: The speed of light in alcohol is valcohol=cnalcohol=3×108 ms1.36=2.2×108 ms

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Q: The wavelength of light is 5000 A. Find the wave number. (E) 5x10 (b) 3 x 10 1 x 100

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Q: Assume the following waves are propagating in air. Calculate the wavelength X2 for visible light of…

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Q: A wave of light having frequency 4 x 10¹4 Hz and speed of light 3 x 10³ m/s enters glass of R.I.…

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Q: What is the frequency of light having a wavelength of 6.50 x 10-6 cm? (Use c = 3.00 x 108 m/s)

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Q: (a)    What is the range of the wavelengths of light that is visible to the human eye?

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Q: How many nanoseconds does it take light to travel 4.50 ftft in vacuum?

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Q: Since the q is negative, shouldn't the answer be positive? (-q = -1.602 x 10-19C). Would it not be…

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Q: A light has a wavelength of 580nm. What is the frequency of the wave?

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Q: compute the index of refraction for the substance where lightpropagates with speed v=2.7 • 10^8 m/s.…

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Q: Austin did a measurement for the speed of light in an experiment. He found that the speed of light…

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A: Expression of the relation between refractive index and temperature. n20=nT+0.0004T-20

Q: Distances in space are often quoted in units of light years, the distance light travels in one year…

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Q: Imagine you are at a location where some incident light source provides light at an intensity of 10…

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Q: What would be the speed of light through a particular medium if the frequency is 5.63 x 106 Hz and…

A: Given, the frequency of the light  f=5.63×106Hz wavelength λ=63.86 m we know that speed of light…

Debye Theory of Solids

In solid-state physics, debye theory is used to estimate the phonons contributing to the specific heat capacity in a solid. It explains that the specific heat is a consequence of the vibrations of the atomic lattice of the solid, which is in contrast to the Einstein model. In the Einstein model, solids are treated as independent, non-interacting quantum harmonic oscillators. This model clearly explains the low-temperature dependence of the heat capacity, which is proportional to T3. This is known as Debye T3 law.