Please help me! I am struggling in Physics right now as it is my weakest subject. This unit is really tough with me. I need all the help I can get. Please include step by step instructions/details so I can actually understand what is going on in the question.

***Please only do Question 4***

d d sine = sine2 Gin = speed of light or fs 2 = d sine in value S n or air) a = xd nl ty and MagnetismLab Component: ( /5) x 2 Questions: 1. Monochromatic light is incident on a diffraction grating in air. What happens to the diffraction pattern when the entire apparatus is placed in water? Explain. (/2) 2. In a double slit experiment, light of wavelength 400 nm produces a 2"d order maximum at a specific location on a screen. Determine what wavelength of visible light would have a minimum at the same location. ( /2) 3. Light that has a wavelength of 630 nm in air is incident on a diffraction grating that has a line density of 500 lines/mm. The grating is immersed in water (index of refraction of water = 1.33), as is a viewing screen 15.0 cm away. How far from the central maximum are the first order maxima? ( /4) 4. Laser light passes through a diffraction grating that has a line density of 600 lines/mm. An interference pattern is produced on a screen that is 0.60 m away. The first order bright band is 0.18 m away from the central bright band. Determine the wavelength of the laser light. ( /3)