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they are brightened by the light
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How is interference in light recognized?
by the light and dark spots (fringes)
Why do light waves with the same wavelength and constant phase difference interfere with eacher to produce light and dark interface patterns?
If their phase difference is constant, then they don't produce light and dark patterns. Light spots are produced where the two sources are in phase, and dark spots where they're out of phase.
How do you measure a strand of hair?
he diameter of a hair (or a thin string or electrical wire) can be measured by scattering laser light on the hair. The scattering creates a diffraction pattern consisting of a line of light and dark spots. If you simply measure the distance from the hair to the projection screen, and the distance from the centre to one of the dark spots, the diameter of the hair can be calculated. Ok, so you're welcome! -Livea
How does diffraction grating create a spectrum?
Let's make certain we are on the same page first. A diffraction grating is an apparatus (piece of plastic, glass, ceramic) that has anywhere from one to ten thousand (or more!) thin grooves cut into it. The grooves act as slits that allow light to pass through the grating at regular intervals. In order to produce a decent diffraction pattern (often called interference fringes), the light must be coherent; that is, the light waves coming from the source must be in phase, containing waves vibrating in the same manner (i.e. rising to a crest and falling to a trough at the same points). When monochromatic coherent light (think laser light) strikes a diffraction grating, the light spreads out past the slits and shines onto a screen. When the light passes through the slits, some light rays travel straight through, but others travel at an angle away from the slits. When the angled light rays meet other light rays, they interfere and produce either bright spots (antinodes) or dark spots (nodes). If the interfering light rays are in phase, the rays interfere constructively, and the spots are bright; but, due to destructive interference, the spots are dark if the interfering rays are out of phase. With monochromatic light, the diffraction pattern is a series of bright spots separated by dark bands. For instance, if we shone a green laser through a diffraction grating in a dark room, we would see green spots alternating with black bands. The process is the same for composite light, but the results are a little different. White light is called a composite light because it is composed of six basic colors: redo, orange, yellow, green, blue, and violet. Colors of light are our perception of light waves' frequencies. Since these different colors of light have different frequencies, they also have different wavelengths, and waves with different wavelengths diffract differently. You might remember that longer wavelengths (red light) refract less than short wavelengths (violet light). This pattern is reversed for diffraction: of all the colors of the visible spectrum, red diffracts the most, and violet diffracts the least. Therefore, when white light is shone through a diffraction grating in a dark room, the light waves still spread out past the slits just as monochromatic light does; however, the red light angles away from a slit more than any other color of light, and the violet light angles away the least. The other colors of the visible spectrum fill in the intervening space, and pow!--you have a spectrum! In fact, you should have at least two visible spectra, one on either side of a bright white spot, separated from the white spot by black bands.
What are Dark spots seen on the sun are called?
Sunspots. Do not look at the sun directly. You will be blinded. Answer 2: They are called Sun's dark spots. The new study reports that Sun's dark spots seem to form when uranium fission lifts away a large chunk of Sun's core material along with fission fragments into nuclear fallout. A large crater formed at the site of fission appears as Sun's dark spot since no emission takes place from the site, while the remaining Sun's disk show very low intensity at Bharat Radiation, UV and visible light wavelengths.
What do smudge dark dirty spots and thick smoke all have in common?
Dirt, grime and carbon particles
Why do dalmatian dogs have spots?
They have spots because they appear on their coats.
What is the reason for serial of light spots appearing on the measuring scale?
The reason for serial of light spots appearing on the measuring scale is due to an effect known as parallax error. Parallax error occurs when the measurer's eye is not directly over the scale, causing the light spots to appear in a series. This can be caused by the measurer moving their head or body while taking a measurement, or the measurer not being in the correct position to take an accurate measurement. The light spots will appear in a series because the measurer's eye is seeing the measurer's scale from different angles. As the measurer moves, the angles change and the light spots appear in a series. This can lead to inaccurate measurements, as the measurer may not be able to accurately read the scale due to the parallax error. To remedy this, the measurer should make sure they are in the correct position before taking a measurement, and should not move while taking a measurement.
What do you have when giants spots appear on your body?
A problem
Why do spots appear dark?
Spots appear dark because they are much cooler than the surrounding area. They are still very hot, but not as much as the rest of the Photosphere.
Can you write a sentence with the word appear in the sentence?
When did the spots first appear on the baby's face? They appear to be from an allergic reaction.
How did giraffes get there spots?
they appear a couple days after they are born
What are dark spots that appear on the surface of the sun?
Sunspots
When iodine solution is dropped onto plant cells why do dark blue spots appear?
Dark blue spots appear to show that there is starch on the plant cells. -Anonymous-
What are distal spots?
Distal spots are spots of color that appear inside a white marking on the lower leg (such as a sock or stocking). Distal spots are above the fetlock, as opposed to ermine spots, which are below the fetlock.
What color are cheetah spots?
the cheetahs color are brownish with black spots
What are dark spots that appear on the surface of the sun called?
Sunspots
