The role of the project manager encompasses many activities including: 1  Planning and Defining Scope. 2  Activity Planning and Sequencing. 3  Resource Planning. 4  Developing Schedules. 5  Time Estimating. 6  Cost Estimating. 7  Developing a Budget. 8  Documentation. 9  Creating Charts and Schedules. 10  Risk Analysis. 11  Managing Risks and Issues.
(Answer #1). The critical angle is the largest angle at which light rays inside a diamond can escape. The more a material bends light, the higher the RI Refractive index, the smaller its critical angle.Because diamond has a high RI, it has only a small critical angle, 24.5 degrees.Answer #1). The critical angle is the largest angle at which light rays inside a diamond can escape. The more a material bends light, the higher the RI Refractive index, the smaller its critical angle.
Below are some exerps from their website on diamonds and their sparkle. Diamond's tight crystalline structure slows light down like no other substance on Earth.. Light pokes along inside a diamond at less than 80,000 miles per second.That's more than 100,000 miles per second slower than in air.elow are some exerps from their website on diamonds and their sparkle. Diamond's tight crystalline structure slows light down like no other substance on Earth.. Light pokes along inside a diamond at less than 80,000 miles per second.