Which of the following is true about the value of refractive index of quartz glass
a. Same in all directions
b. Different in different directions
c. Cannot be measured
d. Always zero
Ans.a
Explanation : Since quartz glass is an amorphous solid having short range order of constituents. Hence value of refractive index is same in all directions can be measured and not be equal to zero always.
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dm-3 sucrose solution at 20 ° C (molar gas constant, R = 8.314 JK -1 mol -1 ; 1 dm-3 = 0.001 m3 ) a. 4870 Pa b. 4.87 Pa c. 0.00487 Pa d. 0.33 Pa Ans. a (17)
