Difference between revisions of "Mirage"

From UO Physics Demonstration Catalog

(Created page with "{{NewDemo|subject=Light and Optics|topic=Geometrical Optics|file1=Real Image.gif}} A box is constructed such that a lightbulb is hanging upside-down inside the box. A large concave mirror is placed behind the box, which causes an image of the lightbulb in the box to appear on top of the box. A "dummy" lightbulb that is not connected to a voltage source is screwed into the socket on top of the box. The image projected of the lit lightbulb inside the box makes the dummy l...")
 
 
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{{NewDemo|subject=Light and Optics|topic=Geometrical Optics|file1=Real Image.gif}}
{{NewDemo|subject=Light and Optics|topic=Geometrical Optics|file1=Mirage2.gif|file2=Mirage.JPG}}


A box is constructed such that a lightbulb is hanging upside-down inside the box. A large concave mirror is placed behind the box, which causes an image of the lightbulb in the box to appear on top of the box. A "dummy" lightbulb that is not connected to a voltage source is screwed into the socket on top of the box. The image projected of the lit lightbulb inside the box makes the dummy lightbulb look as if it is illuminated. This effect is visible to all students in the classroom from all angles. The dummy bulb can be unscrewed and will still appear lit. It can be completly removed, and students in the center rows will still see the image of the inside bulb. The demo can be rotated so all can see the effect. At the end of the demonstration, the cart should be rotated 180 degrees so the students can see that the light source is upside-down, showing that the image is inverted as well as real.
A closed oval apparatus that has s concave front surfaced spherical mirrors on the top  and bottom. An object placed inside the apparatus will look like it is floating at hole on the top surface of the apparatus. The two mirrors create a real image at the top. You can put your finger and see there is object actually there. Be careful with mirrors . They can become easily scratched. '''Do not''' try and clean them by wiping with a paper towel..  


'''Location:
'''Location:
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* BC-0
* M-4

Latest revision as of 08:25, 30 October 2023

Return to Geometrical Optics

Mirage2.gif
Mirage.JPG

Description:

A closed oval apparatus that has s concave front surfaced spherical mirrors on the top and bottom. An object placed inside the apparatus will look like it is floating at hole on the top surface of the apparatus. The two mirrors create a real image at the top. You can put your finger and see there is object actually there. Be careful with mirrors . They can become easily scratched. Do not try and clean them by wiping with a paper towel..

Location:

  • M-4