In the visible spectrum, red light has the lowest frequency and violet light has the highest. list the following colors in order of increasing energy. green blue yellow orange a) blue, green, yellow, orange b) orange, yellow, green, blue c) yellow, orange, blue, green eliminate d) green, blue, orange, yellow

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.