Physics 30 Unit C: EMR Assignment 1: EMR as a Wave (1-2hrs) Name : Dawood Amjoll 1. Using ray diagrams, sketch the image produced. 2 . Identify the type of mirror or lens. Describe the image produced. Type: Image: Type: Image: Type: Image Type: Image: Ma\f/water=1.33 glass=1.52 / diamond-2.42 nplastic=1.30 1. Determine the speed of light (in m/s) in diamond. 2. Determine the critical angle (in degrees) of a water-glass interface. 3. Determine the angle of refraction (in degrees) when a light ray enters water from air at 35.0. 4. In air, yellow light has a wavelength of 580 nm. Determine the wavelength (in nm) of the light in plastic. 5. A concave mirror produces an upright virtual image that is 3.00 times taller than the object. The focal length of the mirror is 15.0cm. Determine the distance (in cm) to the image (d;). 6. A convex lens produces a real inverted image at a distance of 50.0cm. The focal length of the lens is 10.0cm. Determine the distance (in cm) to the object (do). 7. Describe two situations which will produce virtual images for concave and convex, mirrors and lenses.Physics 30 Unit C: EMR Lab 1: EMR as a Particle (1-2hrs) Name: Data was carefully generated by recording the stopping voltage of an unknown metal while varying the frequency of the EMR being shone on it. Using the data generated below, 1. Plot a graph which will allow you to determine the threshold frequency and work function of the metal. 2. Using the graph, determine the threshold frequency (in Hz) and the work function (in ev) of the unknown metal. 3. Using the work functions provided, identify the unknown metal. Vstop (V) f (Hz) 0.971 1.50E+15 3.51 2.00E+15 4.58 2.50E+15 7.62 3.00E+15 10.3 3.50E+15 9.87 4.00E+15 12.6 4.50E+15 16.2 5.00E+15 19.5 5.50E+15 20.9 6.00E+15 22.7 6.50E+15 25.8 7.00E+15 23.4 7.50E+15 Element Work Function (ev) Cesium 2.10 Magnesium 3.68 Mercury 4.50 Gold 5.10 Platinum 6.35