(A) A red light source and a green light source shine on a white screen. What color will the screen be? Explain your answer

(B) if a blue object is aced in front of the screen, what color will it be? Explain your answer

How much current flows in a 12-watt radio connected to a 120-volt circuit?

(A) When a red light source and a green light source shine on a white screen, the screen will appear yellow. This is because white light is composed of a combination of all colors in the visible spectrum. When red light and green light are combined, they create yellow light. Therefore, the screen will reflect a yellow color.

To understand this, you can refer to the concept of additive color mixing. In additive color mixing, different colors of light are combined to create new colors. Red light has a wavelength that corresponds to the longer end of the visible spectrum, while green light has a wavelength in the middle of the spectrum. When red and green lights are combined, they add up to create yellow light, which is closer to the shorter end of the spectrum than red light.

(B) If a blue object is placed in front of the screen, it will appear cyan (blue-green) in color. This is because when blue light from the object interacts with the yellow light reflected by the screen, it creates a visual effect of the complementary color.

To understand this, you can refer to the concept of subtractive color mixing. When white light (or in this case, yellow light) passes through or interacts with a colored object, the object absorbs certain wavelengths and reflects others. In this case, the blue object absorbs red and green wavelengths from the white light, allowing only blue light to be reflected. When blue light is reflected from the blue object and combines with the yellow light from the screen, it creates the perception of a cyan color.

Overall, the color appearance of an object is determined by the combination of the light that illuminates it and the way the object interacts with or absorbs specific wavelengths of light.