How to Conduct a Magnifying Glass Experiment
What kind of lens is the magnifying glass?
a. Convex lens
b. Concave lens
What is the focal length of the magnifying glass when used outside?
a. Short focal length
b. Long focal length
Answer:
For the magnifying glass, it is a convex lens.
Explanation:
When using the magnifying glass outside on a sunny day, the focal length will be short. The concentrated rays of sunlight passing through the convex lens will create a focal point, which can be measured to determine the focal length of the magnifying glass.
To conduct the experiment, go outside on a sunny day and place a piece of paper on a patch of asphalt, concrete, or a large flat rock. Make sure there are no combustible materials nearby. Hold the magnifying glass close to the paper with sunlight passing through it. Move the magnifying glass until the most concentrated ray of light shines on the paper, determining the focal point. Measure the distance between the focal point and the magnifying glass to find the focal length, taking caution as the paper may catch fire if exposed for too long.
After conducting the experiment outside, take the magnifying glass inside and use it to look at words in a book. The focal length will be different indoors compared to outside due to varying light conditions and distances.