Lens Lab Intro & Part 1
Purpose: Students will observe how lenses refract light.
The materials in your kit make it possible to see how lenses bend or refract light.
The materials in your kit make it possible to see how lenses bend or refract light.
Introduction:
- Lens 1 (a “1” is stamped on the bottom) is a double convex lens – feel it.
- Lens 2 (a “2” is stamped on the bottom) is a plano-convex lens – feel it.
- Lens 3 (a “3” is stamped on the bottom) is a double concave lens – feel it.
- Describe how the three lenses feel the same and how each is different.
Part 1:
1. Set the slotted plate into a holder and slide it into the base. Set the large cardboard sheet into the middle slots in the base so that the notched end touches the slotted plate. The lights will be dim for this exploration.
1. Set the slotted plate into a holder and slide it into the base. Set the large cardboard sheet into the middle slots in the base so that the notched end touches the slotted plate. The lights will be dim for this exploration.
2. Put the candle on its holder and set it at least 30 centimeters away from the slotted plate. Light the candle and move it from side to side until the candle light makes clear rays and shadows on the large cardboard sheet. Be careful with the lit candle! Record and draw what you see in your notebook!
3. Remove the cardboard sheet without moving the base. Set Lens 1 into a holder and slide it onto the base to the slotted plate. Replace the cardboard sheet so the notch is over the center of the lens.
4. How do the light rays look with Lens 1 in place compared to no lens?
a. Draw what you see.
a. Draw what you see.
5. Replace Lens 1 with Lens 2. (You will have to remove the cardboard sheet first and then replace it.)
How do the light rays look with the Lens 2 in place compared to Lens 1 and no lens?
a. Draw what you see.
6. Replace Lens 2 with Lens 3 in the same way.
How do the light rays look with the Lens 3 in place compared to Lenses 1& 2 and no lens?
a. Draw what you see.
Analysis
1. How did the concave lenses refract the light?
2. How did the convex lens refract the light?
Conclusion:
Write a conclusion about today's lab. What did it teach you about refraction of light? What did it just confirm that you already knew? How did the data help you? Did you enjoy it? Was it beneficial? Etc. Upload data table, and drawings to Edmodo.
How do the light rays look with the Lens 2 in place compared to Lens 1 and no lens?
a. Draw what you see.
6. Replace Lens 2 with Lens 3 in the same way.
How do the light rays look with the Lens 3 in place compared to Lenses 1& 2 and no lens?
a. Draw what you see.
Analysis
1. How did the concave lenses refract the light?
2. How did the convex lens refract the light?
Conclusion:
Write a conclusion about today's lab. What did it teach you about refraction of light? What did it just confirm that you already knew? How did the data help you? Did you enjoy it? Was it beneficial? Etc. Upload data table, and drawings to Edmodo.