2. A laser beam is shone through two slits, separated from each other by 0.5 mm, and onto a screen 10 m away. The distance between successive bright spots on the screen is 1cm. What is the wavelength of the light? State whether the maxima will move closer together or further apart: (i) if you move the screen further away; (ii) if you move the slits closer together (iii) if you immerse the whole apparatus in water (the speed of light is slower in water). Justify your answers.

2. A laser beam is shone through two slits, separated from each other by 0.5 mm, and onto a screen 10 m away. The distance between successive bright spots on the screen is 1cm. What is the wavelength of the light? State whether the maxima will move closer together or further apart: (i) if you move the screen further away; (ii) if you move the slits closer together (iii) if you immerse the whole apparatus in water (the speed of light is slower in water). Justify your answers.