Which diagram shows a light ray moving from a more dense into a less dense medium? A black horizontal line intersected at right angles by a dotted orange line labeled Normal. An arrow strikes the intersection point from above and continues at a shallower angle relative to the horizontal line below. A black horizontal line intersected at right angles by a dotted orange line labeled Normal. An arrow strikes the intersection point from above and continues at the same angle relative to the horizontal line above. A black horizontal line intersected at right angles by a dotted orange line labeled Normal. An arrow strikes the intersection point from above and continues at a steeper angle relative to the horizontal line below.

its A

Explanation:

are there answer choices to this question? this seems like a question where you have options to choose from.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: