Question

Problem 1 A concave miror has a focal length of 20 cm. What is the position of the resulting image if the image inverted and 3 times smaller than the object? is A) 27 cm B) 30 cm C) 35 cm D) 25 cm E) 29 cm Problem 2 A catfish is spotted at the bottom of a creek. The depth of the water is 1.5 m. A hunter (with no knowledge of optics) fires a rifle shot, directly aimed at the catfish. The bullet strikes the water at an angle of 40 to the water. Assume that the bullet is not deflected by the air/water interface, what is the distance from the bulet hole at the bottom of the creek to the catfish? A) 0.32 m B) 0.49 m C) 0.73 m D) 0.88 E) 0.97 m 40° Water n-1.33 Bullet Catfish Problems-A certain kind of glass has an index of refraction of 1.66 for blue Ight(440 nm) and an index of 1.5 for red light (690 nm). Now a beam containing these two colors is incident at an angle of 35 on a piece of this glass. What is the angle between the two beams inside the glass? A) 2.27 B) 0.93 C) 3.97 D) 3.23 E) 5.21 Problem 4 A current path shaped as shown in the figure produces a magnetic field at P, the center of the arc. If the a subtends an angle of θ Ξ 50" and the radius of the arc is 05 m, what are the magnitude of the field produced at P if th current is 2 A? A) 454 nT B) 349 nT C) 782 nT D) 531 nT E) 279 nT 1 of 7

Answer 1