1 Sketch an arrangement that may be used to observe the fringe pattern when light from a narrow slit illuminated by a sodium vapour
lamp is passed through a double slit.​

Ared apple is illuminated by a blue light the apple will appear

=force × distance a. work b. velocity c. pressure d. momentum

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?