You are observing a 20 cm-tall object in a pinhole camera (with a screen at the end like those you used in lab/recitation this week). The screen is 25 cm from the pinhole. The image on the screen is 5 cm tall. (Note: try to do this problem without a calculator since the calculations involved are the type you would be expected to be able to do on an exam without using a calculator.) 1. What can you say about the image? a. Inverted, Enlarged b. Upright, Reduced c. Inverted, Reduced d. Upright Enlarged 2. How fart from the pinhole is the object in cm? d= 3. If you moved the object closer to the pinhole, the image on the screen would a. Stay in focus but decrease in size b. Stay in focus but increase in size c. Lose focus
Applications Of Reflection Of Light
When a light ray (termed as the incident ray) hits a surface and bounces back (forms a reflected ray), the process of reflection of light has taken place.
Sign Convention for Mirrors
A mirror is made of glass that is coated with a metal amalgam on one side due to which the light ray incident on the surface undergoes reflection and not refraction.
You are observing a 20 cm-tall object in a pinhole camera (with a screen at the end like those you used in lab/recitation this week). The screen is 25 cm from the pinhole. The image on the screen is 5 cm tall. (Note: try to do this problem without a calculator since the calculations involved are the type you would be expected to be able to do on an exam without using a calculator.)
1. What can you say about the image?
a. Inverted, Enlarged b. Upright, Reduced c. Inverted, Reduced d. Upright Enlarged
2. How fart from the pinhole is the object in cm?
d=
3. If you moved the object closer to the pinhole, the image on the screen would
a. Stay in focus but decrease in size
b. Stay in focus but increase in size
c. Lose focus
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