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.
        Stars twinkle because of turbulence in the Earth's atmosphere. Stars twinkle (and planets do not) because stars appear to us only as points of light. For instance, the very nearest star (other than the Sun) presents no bigger a disk to us than a dime would at a hundred miles away.he Hubble telescope was put into orbit around the Earth so that it is permanently situated above the atmosphere, and its users never have to worry about it distorting their images-this has allowed astronomers to get the best images of, for example, the most distant galaxies ever produced.