Transcript
Physics 30: Module 5: Lesson 6 2 Assignment
Module 5: Lesson 6 ASSIGNMENT
This Module 5: Lesson 6 Assignment is worth 20 marks. The value of each assignment and each question is stated in the left margin.
(20 marks) Lesson 6 Assignment: Diffraction and Interference
A 1. After viewing the video clip, draw two waves (one below the other) and the resultant wave to illustrate the following. If you find it easier, draw your waves on a separate sheet of paper and then scan them. You may then insert them into this document or email them to me as an attachment.
(2 marks)
complete constructive interference
Answer:
(2 marks)
complete destructive interference
Answer:
A 2. Using the Diffraction Grating simulation, set the slit count to 2.0, the wavelength to 550.0 nm, the slit width to 0.1 mm, and the slit spacing to 0.2 mm. Observe how the following changes affect the interference pattern.
(1 marks)
decreasing the wavelength
Answer:
(1 marks)
increasing the wavelength
Answer:
(1 marks)
decreasing the slit width
Answer:
(1 marks)
increasing the slit width
Answer:
(1 marks)
decreasing the slit spacing
Answer:
(1 marks)
increasing the slit spacing
Answer:
(3 marks) A 3. A scientist is double-checking the wavelength of a new laser. The scientist sets up a diffraction grating with 5.00 ´10–6 m between slits, in front of the laser 1.50 m in front of a screen. The scientist measures the distance from the central maximum to the second bright fringe, which is 0.330 m. What is the wavelength of the laser?
Answer:
A 4. As part of a laser light show, the technician is adjusting a diffraction grating. A green laser with a wavelength of 532 nm is shone on a diffraction grating with
2700 lines/cm. The screen is 35 m from the diffraction grating.
(1 mark)
What is the distance between the slits of the diffraction grating?
Answer:
(3 marks)
How far from the central maximum will the bright fringe be?
Answer:
(3 marks) A 5. A student is looking at a monochromatic light source and is looking for the third bright fringe. The light has a wavelength of 625 nm and has passed through a diffraction grating with a slit separation of 2.80×10–6 m. At what angle should the student look for the third bright fringe?
Answer:
Once you have completed all of the questions, submit your work to Moodle.
