kuruman said:No. Answer me this, if you double the distance between the source and the screen, by what factor is the intensity on the screen reduced?
Correct. Now call the original screen-to-source distance one "unit". How many "units" is the image-to-source distance?digitaljeff said:decreases by the square of the distance from the source?? i think.. just re-reading my textbook trying to figure it out
kuruman said:Two units is the mirror-to-source distance. The image is behind the mirror by an additional how many units?
The purpose of using a mirror to determine light intensity is to reflect the light onto a surface where it can be measured. This allows for a more accurate and precise measurement of the light intensity.
A mirror can increase the intensity of light by reflecting it onto a smaller area, thus concentrating the light and making it appear brighter. However, it can also decrease the intensity if the mirror is not positioned correctly and reflects the light away from the measuring device.
The accuracy of using a mirror to determine light intensity can be affected by the quality and cleanliness of the mirror, the angle at which the light is reflected, and any obstructions or shadows that may interfere with the reflected light.
Yes, different types of mirrors can produce different results when determining light intensity. For example, a concave mirror will focus the light onto a specific point, while a flat mirror will reflect the light in the same direction it came from.
The recommended method for determining light intensity with a mirror is to use a high-quality, clean mirror at a 45-degree angle to the light source. The reflected light should then be measured with a light meter or other measuring device to get an accurate reading of the light intensity.