Touch the Spring
TOUCH THE SPRING shows you a very convincing real image of a spring, which you can see but not touch. A large concave spherical mirror forms the image of a steel spring concealed under the platform where its image appears. You can further surprise your senses by shining a penlight on the image of the spring. A diagram on the exhibit shows where the real object is and illustrates how the light is reflected from the actual spring to your eye.
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