Question 1 A blind is pulled down to cover a window but it has a pinhole in it that is allowing sun to enter the room. On a wall that is 3.40 m away you can see a circular diffraction pattern from the pinhole. The central maximum of this circular diffraction has a diameter of 0.900 cm. What is the diameter of the pinhole? ( Hint: The average wavelength of sunlight is 550 nm.) Question 2 A 2.40-cm-tall candle flame is 1.80 m from a wall. You happen to have a lens with a focal length of 22.0 cm, and notice while playing around with it that there are two locations you can place the lens and form a well-focused image of the candle flame on the wall. With the lens in the location closest to the wall, what is the height of the image? (Input a positive height):Question 1 3 A sample of 14C has an activity of 1.39 Ci. What is the mass of the sample? Use the following tables for half-lifes and atomic masses (in atomc mass units)