A red flower seen in the light of mercury vapour lamp through a green filter will appear?
To understand how a red flower would appear in the light of a mercury vapor lamp through a green filter, we need to consider the principles of color mixing and the properties of the objects involved.
A mercury vapor lamp emits predominantly blue and green light, with very little red light. A green filter, as the name implies, allows only green light to pass through, while blocking other colors.
When a red flower is illuminated by the light from a mercury vapor lamp, most of the red light it reflects will be absorbed by the green filter. This is because the filter only allows green light to pass through, so the filter will block the red light reflected by the flower.
Therefore, when viewing the red flower through a green filter under the light of a mercury vapor lamp, the flower would appear significantly darker or even black. This is because the green filter absorbs most of the light that would allow us to perceive the flower's red color.
The key here is understanding the properties of the light source, the filter, and how objects reflect and absorb different colors of light. Using this knowledge can help us make predictions and understand how colors may appear in different scenarios.