a. What is dispersion of light? Why does it happen? (4 pts) b. A laser beam travels through an unknown transparent material. When it reaches a boundary with air, the angle of reflection is 30.0°, and the angle of refraction is 45.0°. (c=3×108 m/s)(a) What is the index of refraction of the material?(b) What is the speed of light in the material?(c) What is the critical angle for total internal reflection? (6 pts)

a. A bar magnet is moved toward a coil of wire. According to Lenz’s Law, in which direction will the induced current flow, and why? (4 pts) b. A coil consists of 120 turns of wire. Each turn is a rectangle with length 25 cm and width 10 cm. A uniform magnetic field, directed perpendicular to the plane of the coil, increases linearly from 0 to 0.60 T in 0.40 s. Find the induced emf. (6 pts)  

Which of the following methods is not used to study the level of RNA synthesis in a sample of cells at the genomic level?

Let’s suppose that fitness depends on the relative numbers of individuals with a given genotype. The B allele is dominant to the b allele. If the percentage of individuals with the BB or Bb genotype is very low, the fitness values of the BB or Bb genotypes are higher than the bb genotype. In contrast, when the percentage of individuals with the bb genotype is very low, the fitness of the bb genotype is the highest.  This is an example of

a. An erect object is located between a concave mirror and its focal point. Describe the nature of the image. (4 pts) b. An object is placed 20.0 cm in front of a lens. The image formed is upright and 2× larger than the object. Find the image distance first. Then calculate the focal length. Identify the lens. (6 pts)

In the figure, a real inverted image I of an object O is formed by a certain lens (not shown); the object-image separation is d = 33.9 cm, measured along the central axis of the lens. The image is just 1/4 the size of the object. (a) What kind of lens must be used to produce this image? (b) How far from the object must the lens be placed? (c) What is the focal length of the lens?

Which of the following events does not occur all the time in a single cycle of PCR?

In a population in Hardy-Weinberg equilibrium, the percentage of individuals exhibiting a recessive disorder is 1%, which is the same as 0.01. What is the frequency of heterozygotes? 

What is the purpose of using the BLAST program?

The allele frequency of C is 0.2 and c is 0.8. If the population is in Hardy-Weinberg equilibrium, what is the frequency of heterozygotes?