Science Advisor. 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 speed of light in a vacuum is 299,792,458 metres per second, a figure scientists finally agreed on in 1975 – but why settle on that figure? Calculate speed of light in water. No. 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 . 2,469 29. Refractive index = Speed of light in vaccum / Speed of light in water. It's the effect of resonances on all possible wavelengths. 0 0 0 3 ; μ w a t e r = 3 4 ) View Answer How fast does light travel, and does it travel faster in water or air? ), clocking in at a great 2.99 x 10 8 m/s. wilenemarais1 wilenemarais1 Answer: … When light enters a more dense substance (higher refractive index), it ‘bends’ more towards the normal line. Thereby, the speed of red light should be slower in water than blue light contrary to that in glass, right? And why does it matter? The speed of light in water is 2 See answers begumsadiya50077 is waiting for your help. The true value is .75; that is, the speed of light in water is three quarters of the speed of light in air. Answering those questions takes us on an amazing journey through space, time, physics and measurement, and the tale hasn't quite been told yet. Therefore, refractive index of the water can be measure by the Speed of light in water is 2.25 × 10^8 m/s. The speed of light in water is - 19381101 begumsadiya50077 begumsadiya50077 16 minutes ago Physics High School 5. Substituting in the value for x and solving for r gives an estimate for the speed of light in water. 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. It is denotes as n = c / v, v = c / n= 3 × 10^8 m/s / (1.33) = 2.25 × 10^8 m/s. Click hereto get an answer to your question ️ Refraction index of water is 4/3. When light travels from air into water, it slows down, causing it to change direction slightly. The fastest thing in the whole universe is the speed of light in a vacuum (like outer space! Add your answer and earn points. Nov 2, 2010 #14 K^2. Speed of light doesn't depend on absorption at that specific wavelength. 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. This change of direction is called refraction. 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