Lens Lab

optics bench set-up,10-15 cm focal length convex and concave lens

1. Sketch how light rays bend when they pass through a concave lens.
2. Identify the focal points.
3. The distance from the lens to the point of convergence or divergence is called the focal length and represented by the letter “f”.
4. Obtain a concave lens from your teacher.
5. Place your lens in the lens holder then position it at the center of the meter stick (50 cm).
6. Place the candle (object) on one side of the lens. The distance from the lens to the object is called the object distance. You will be adjusting the candle according to the table below.
7. Light the candle.
8. View the image of the object by looking into the lens towards the candle.
9. Record the description of the image in the table in your packet.:

1. Sketch how light rays bend when they pass through a convex lens.
2. Identify the focal points.
3. The distance from the lens to the point of convergence or divergence is called the focal length and represented by the letter “f”.
4. Obtain a convex lens from your teacher.
5. Place your lens in the lens holder then position it at the center of the meter stick (50 cm).
6. Place the candle (object) on one side of the lens. The distance from the lens to the object is called the object distance. You will be adjusting the candle according to the table below.
7. Light the candle.
8. View the image of the object by looking into the lens towards the candle.
9. Record the description of the image in the table in your packet.: