Answering those questions takes us on an amazing journey through space, time, physics and measurement, and the tale hasn't quite been told yet. Substituting in the value for x and solving for r gives an estimate for the speed of light in water. The fastest thing in the whole universe is the speed of light in a vacuum (like outer space! Homework Statement what is the speed of light through water? If the measurements are taken carefully then we often get estimates between .76 and .78. The ratio of the time taken by light to travel a distance of 100 m in air and water is (Given c = 3 × 1 0 8 m/s ; μ a i r = 1 . Calculate speed of light in water. This change of direction is called refraction. Thereby, the speed of red light should be slower in water than blue light contrary to that in glass, right? Nov 2, 2010 #14 K^2. speed of light in water v=225,407,863.2" "meter/second Formula for refractive index n=c/v where " " "n=" "refractive index " "c=299792458" "speed of light in a vacuum in " " meter per second " "v=phase velocity of light in the medium Solve for v v=c/n v=299792458/1.33 v=225,407,863.2" "m/sec God bless....I hope the explanation is useful. Therefore, refractive index of the water can be measure by the Speed of light in water is 2.25 × 10^8 m/s. Click hereto get an answer to your question ️ Refraction index of water is 4/3. 0 0 0 3 ; μ w a t e r = 3 4 ) View Answer The speed of light in water is - 19381101 begumsadiya50077 begumsadiya50077 16 minutes ago Physics High School 5. It is denotes as n = c / v, v = c / n= 3 × 10^8 m/s / (1.33) = 2.25 × 10^8 m/s. It's the effect of resonances on all possible wavelengths. The speed of light in water is 2 See answers begumsadiya50077 is waiting for your help. Refractive index = Speed of light in vaccum / Speed of light in water. When light enters a more dense substance (higher refractive index), it ‘bends’ more towards the normal line. ), clocking in at a great 2.99 x 10 8 m/s. The true value is .75; that is, the speed of light in water is three quarters of the speed of light in air. In water, light travels at 75 percent the speed it would in the vacuum of outer space, but the electrons created by the reaction inside of the core travel through the water faster than the light does. Add your answer and earn points. Speed of light doesn't depend on absorption at that specific wavelength. And why does it matter? wilenemarais1 wilenemarais1 Answer: … No. How fast does light travel, and does it travel faster in water or air? When light travels from air into water, it slows down, causing it to change direction slightly. 2,469 29. Science Advisor. 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