Table of Contents
What happens to the wavelength of light as you go from blue to red?
Red light (at one end of the visible spectrum) has a longer wavelength than blue light. Notice that as wavelength increases, frequency decreases. But there are waves with higher frequencies (shorter wavelengths) than blue light and waves with lower frequencies (longer wavelengths) than red light.
Why do we perceive the colors of the spectrum differently?
When light hits an object, some of the spectrum is absorbed and some is reflected. Our eyes perceive colors according to the wavelengths of the reflected light. We also know that the appearance of a color will be different depending on the time of day, lighting in the room, and many other factors.
What is the relationship of the frequencies of red and blue light?
Blue light has shorter waves, with wavelengths between about 450 and 495 nanometers. Red light has longer waves, with wavelengths around 620 to 750 nm. Blue light has a higher frequency and carries more energy than red light.
What is closer to purple red or blue?
violet
In the traditional color wheel used by painters, violet and purple are both placed between red and blue, with violet being closer to blue.
How is wavelength related to the energy of the colors of light?
The visible light portion of the electromagnetic spectrum shows the rainbow of colors, with violet and blue having shorter wavelengths, and therefore higher energy. At the other end of the spectrum toward red, the wavelengths are longer and have lower energy (Figure 3).
What aspect of a colour controls whether it is perceived as red blue or any other color?
The color of a light source can be described by measuring the relative powers of various wavelengths. As this spectral power distribution (SPD) changes, so does the way light is reflected to our eyes, which affects the colors we perceive.
How do we perceive different colours?
Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. Newton observed that color is not inherent in objects. Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors.
How will you describe the relationship between frequency and energy of the colors of light?
Just as wavelength and frequency are related to light, they are also related to energy. The shorter the wavelengths and higher the frequency corresponds with greater energy. So the longer the wavelengths and lower the frequency results in lower energy. The energy equation is E = hν.
How does the frequency of a light wave which appears red compare with the frequency of the vibrating electrons that produce it?
How does the frequency of a radio wave compare to the frequency of the vibrating electrons that produce it? They are the same. The wavelength is inversely proportional to the frequency.
Why does red and blue make purple?
Combining red and blue together makes purple if you are talking about pigments, certain types of materials which can be combined together. Magenta absorbs green light, yellow absorbs blue light, and cyan absorbs red light. Mixing blue and red pigments together will give you the color violet or purple.