2a) The refractive index of a transparent material can be determined by measurin

Question

2a) The refractive index of a transparent material can be determined by measuring the critical angle when the material is in air (nair = 1.00). If c = 41.1 deg, what is the index of refraction of the material?

B) For the previous problem, what is the speed of the light in the plastic?

3.A source with a surface area of 3.3 cm^2 produces 2.60 W of acoustical power and projects this uniformly in all directions. What will the sound intensity be at a distance of 25.00 cm from the source?

4)A glass beaker with a maximum volume of 500 mL is completely filled with alcohol when at a temperature of 11.0 deg. C. If the temperature is increased to 41.0 deg. C, what volume of alcohol will overflow?

5) A steel pipe has a length of 16.0000 m at 16 deg. C. If its temperature is increased to 28 deg. C, what will its length be?

Explanation / Answer

the index of refraction is,

           n = 1/ sinc = 1 / sin41.1 = 1.52

speed of sound in plastic:

      v = c/n = 3x10^8 / 1.50 = 2x10^8 m/s

Related Questions

Navigate

• Browse (All)
• Browse 2
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.