Which of the following is not true of color blindness?
1. a color blind person cannot see any colors.
2. color blind people learn to rely on shapes, patterns, and positions of signs and signals.
3. for some people, it might be difficult to recognize colors of traffic lights and signs.
4. red-green color blindness is the most common type of color blindness.

Avery long solenoid of inner radius 2.75 cm creates an oscillating magnetic field of the form = for this solenoid, =0.00425 t and =319 rad/s. (a)what is the maximum value of the induced electric field at a perpendicular distance 1.45 cm from the axis of the solenoid? (b) what is the maximum value of the inducted electric field at a point 5.85 cm perpendicular from the axis of the solenoid?