Physics problem: Cover the camera lens with red filter paper and shoot green leaves and yellow flowers. What color are the flowers in the photo?

This question didn't say whether to shoot with color film or black and white film.

If it is a color film, you get a photo with a red cover, that is, the photos are all red, but the shades are different.

If it is a black-and-white film, because red and green are complementary colors, the green light is cut off by the red filter and appears black on the black-and-white film.

Yellow contains red and green (in RGB, red+green = yellow), so red light passes through and green is cut off. In black and white photos, yellow is light gray.

Correct the statement on the first floor (it may be a clerical error).

Among the three primary colors of RGB, red R+ green G+ blue B= white.

Of course, the red, green and blue mentioned here are all solid colors.

If the color is not pure, as long as it is equivalent, red+green+blue can only appear gray, and there will be no other colors. It can't be yellow