# How do Concave and Convex Objects Refract Light Differently?

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#### Updated on Sep 25, 2013

Grade Level: 1st - 3rd; Type: Physical Science

### Objective:

This simple experiment will teach kids about convex/concave objects and how they reflect light. They will also learn the difference between concave and convex.

### Research Questions:

• What is the difference between concave and convex objects?
• What are some applications of concave and convex parts?

There are many concave and convex objects around us. In fact, we eat with one everyday. That's right, a spoon is a great example. In fact, all concave objects can be convex and all convex objects can also be concave because everything has at least two sides; it doesn't matter if it is visible or not.

• Flashlight
• Spoon
• A dark room

### Experimental Procedure

1. In a dark room, hold a spoon with the bulged-curved side directly facing a flashlight about three inches away. Turn the flashlight on. What do you see?
2. Now flip the spoon over to the curved-inwards side and shine a flashlight at it as you did in step 1. Now what do you see?
3. Compare the difference in light reflection.

Terms/Concepts: convex; concave; light

References:

Sofia PC is currently a college student with a deep interest in science who is aspiring to become a writer. She writes about all sorts of things across all subjects including, but not limited to; science, crafts, and fashion. She hopes to become a good writer so she can share her thoughts and experiences with the world and future generations.