Question

One plant has red flowers and green leaves.How the flowers and leaves are visible in the red light.
A. Black
B. Green
C. Red
D. None of these

Answer 1

The general rule for answering these types of questions is that "the object reflects its true color and absorbs any other color light." Objects appear in different colors because they absorb certain colors (wavelengths) while reflecting or transmitting others. The wavelengths that are reflected or transmitted are what we see as colors.

Complete step by step answer:
It is critical to understand that an object is nothing more than the color that it reflects. All other colors are absorbed. As a result, the wavelength of light that determines an object's color must be present in the light for the true color to be present. Things appear different in candlelight because candles emit mostly red, orange, and yellow light.
Red, orange, yellow, green, blue, and violet comprise the visible light spectrum. Although other wavelengths of electromagnetic radiation are constantly present around us, these are the only wavelengths that we perceive as color. When we combine all of them, we perceive light as white, and when we remove all of them, we perceive darkness.
As a result, we can say:
Black is not a color; rather, it is the absence of color.
White is not a color, but rather the sum of all colors.
A red flower appears red because it absorbs all other colors except red when normal visible light falls on it. (A normal visible light contains all seven colors.) We see red because the red color is reflected.
If you shine green light on the flower, it will absorb it and nothing will be reflected. That is why you will see it as black, due to a lack of light.

So, the correct answer is “Option A”.

Note: The color of an object is determined by two factors: the color of the light source and the wavelengths of light reflected by the object. To see an object's true color, we must illuminate it with a light source that contains all of the wavelengths that the object will reflect.