1. The speed of light in a material is 1.93 x 10 8 m/s. What is the index of refraction of the material? 2. Light travels from water (index of refraction 1.33) into crown glass (index of refraction 1.52) at an angle of incidence of 42.0 degrees. Find the angle of refraction in the crown glass. (Ans: 35.8 degrees)
3. Determine the index of refraction of a liquid material if the angle of incidence in air is 40.0 degrees and the angle of refraction in the material is 25.9 degrees?

can someone solve and do working of these 3 questions please thanks alot.

answer: the correct answer is   air pressure at the top of mount everest is higher than at the bottom of the grand canyon.

hope this : )

explanation:

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.