Science Answer the questions.[Phy-3M]

i. The current is in the east-west direction. By applying the right-hand thumb rule, we get that the magnetic field (at any point below or above the wire) that turns clockwise in a plane perpendicular to the wire, when viewed from the east end, and anticlockwise, when viewed from the west end.
ii. Following are the methods of producing magnetic fields:
a. By using a permanent magnet we can produce a magnetic field and it can be visualized by spreading iron fillings on a white paper and keeping a magnet beneath the paper.
b. A current-carrying straight conductor produces a magnetic field.

i. The phenomenon of splitting of white light into its constituent colours is called dipersion of light. It is caused due to difference in speed of constituent colours of light travel in the medium other than air/vacuum because of different speed they bend at different angles.
ii. In nature, this Phenomenon is observed in formation of rainbow where all the seven colours constituting white light is visible.
iii. Based on phenomenon of dispersion, we can conclude that
a. White light consists of seven colours. Violet, indigo, blue, green, yellow, orange and red.
b. Violet light suffers maximum deviation and red light suffers minimum deviation.