The refractive index of diamond is 2.42. what is the meaning of this statement?

The refractive index is defined as the ratio of the velocity of light in vacuum to its velocity in a specified medium. The refractive index of diamond is 2.42 means that light moves 2.42 times slower in diamond. The speed of light in diamond will be: v = n c ​ v = 2.42 3 × 1 0 8 ​ v = 1.23 × 1 0 8 m / s

Actually, the secret that's rattling inside a diamond is refraction, total internal reflection (not to be confused with ordinary reflection) & dispersion. The refractive index of diamond is pretty high ( Consider an ideal cut diamond. I explain according to the figure below. When the light is incident at an angle $1$, it refracts inside and travels through the lattice. At the surface which separates air & diamond media, the incident angle $2$ is very well above the critical angle ($c_a$) and simultaneously ($3$ & $4$) the reflection takes place at different surfaces of the diamond. Finally, the light refracts out. The first one shows the mechanism of internal dispersive reflection. The second figure shows the reflections inside ideal cut, deep and shallow cut diamonds. Note: For total internal reflection to take place, light must travel from an optically denser medium to a relatively rarer medium. Also, the incident angle should be far high above thee critical angle. There are youtube goodies regarding the topic... $\begingroup$ Minor point: actually as far as optical materials go, diamond is not very dispersive at all. It's Abbe number is about 55, which is much more typical of materials with much lower refractive index - this value is typical for a material of about 1.5 refractive index. Diamond is a fantastic optical material for this reason: I'm sure we're going to see many more small lenses made of CVD diamond in the next few years as production costs drop. $\endgroup...

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Actually, the secret that's rattling inside a diamond is refraction, total internal reflection (not to be confused with ordinary reflection) & dispersion. The refractive index of diamond is pretty high ( Consider an ideal cut diamond. I explain according to the figure below. When the light is incident at an angle $1$, it refracts inside and travels through the lattice. At the surface which separates air & diamond media, the incident angle $2$ is very well above the critical angle ($c_a$) and simultaneously ($3$ & $4$) the reflection takes place at different surfaces of the diamond. Finally, the light refracts out. The first one shows the mechanism of internal dispersive reflection. The second figure shows the reflections inside ideal cut, deep and shallow cut diamonds. Note: For total internal reflection to take place, light must travel from an optically denser medium to a relatively rarer medium. Also, the incident angle should be far high above thee critical angle. There are youtube goodies regarding the topic... $\begingroup$ Minor point: actually as far as optical materials go, diamond is not very dispersive at all. It's Abbe number is about 55, which is much more typical of materials with much lower refractive index - this value is typical for a material of about 1.5 refractive index. Diamond is a fantastic optical material for this reason: I'm sure we're going to see many more small lenses made of CVD diamond in the next few years as production costs drop. $\endgroup...

The refractive index is defined as the ratio of the velocity of light in vacuum to its velocity in a specified medium. The refractive index of diamond is 2.42 means that light moves 2.42 times slower in diamond. The speed of light in diamond will be: v = n c ​ v = 2.42 3 × 1 0 8 ​ v = 1.23 × 1 0 8 m / s Views: 5,772 F 2 ​ progeny obtained from the following cross. (a) Tt (b) RRyy (c) If a round, green seeded (RRyy) pea plant is crossed with wrinkled, yellow seeded (rrY) pea plant, what will be the genotype of seeds produced in F 1 ​ -generation? 8. Graphically represent independent inheritance of two separate traits of pea. Long Answer Type Questions (5 Marks each) 9. Ovum and sperm are both female and male gametes, respectively. But, what is so intricate in Views: 5,531 1.7 × 1 0 − 8 ohm-metre. Sample Probrem 2. A copper wire has a diameter of 0.5 mm and resistivity of 1.6 × 1 0 − 8 Ω m. (a) What will be the length of this wire to make its resistance 10Ω ? (b) How much does the resistance change if the diameter is doubled? (NCERT Book Qu Sotution. (a) First of all we will calculate the area of cross-section of the copper wire. Here the di opper wire is 0.5 mm, so its radius ( r ) will be 0.5 ​