Homework 3
(1) Look at the sundial located in front of Flandrau Planetarium:
- Write a paragraph describing what you see there.
- Use the projected shadow to tell the time. Compare to the “more accurate” time on your watch, phone, etc.
- How accurate was “shadow-time”?
Enter our building to answer the next 3 questions!
(2) Wander the hallways of Optical Sciences to observe the Laser Warning signs on most of the doors of our research labs:
- Find 3 lasers that emit visible light. For each one, answer the following:
- What is the wavelength of the emitted light?
- What is the power of the laser?
- What is the Class number of the laser?
- What is the room number of the lab?
- Find 3 lasers that emit infrared light (λ > 700nm). For each one, answer the following:
- What is the wavelength of the emitted light?
- What is the power of the laser?
- What is the Class number of the laser?
- What is the room number of the lab?
(3) Look at the “Desert Flower” sculpture in our lobby.
In a paragraph, describe how it works to produce the image of the flower!
HINT: Think “TIR” and how a kaleidoscope works 🙂
(4) Look at the 100-year old studio camera in the tall glass display case in our lobby.
- Is the image that you see on the back of the camera real or virtual?
- Describe how the image relates to the object (the real-world scene out in front of our building).