A reflection of the fish appears on the surface of the water causing it to appear very shallow. … Refraction of light between the air and water causes the fish to appear in a different location.. D.
Why must the Pelican aim for the fish in a slightly different place in the water than where the fish appears to be located?
As the pelican flies above the water’s surface, why must it aim for the fish in a slightly different place than where the fish appears to be located? Light reflects off the fish, except for light of the wavelength the fish absorbs, making the fish hard to see.
When people are trying to spear a fish should they aim above or below where they see the fish explain your answer?
You should aim below the observed fish. Your eyes are being deceived as to the real location of the fish, because the light coming from the fish is refracting (away from the normal) as it passes into the air and to your eye (see figure 28.27, p.
Why is it difficult to pierce a fish swimming in a river?
Answer. Answer: It is difficult to shoot a fish swimming in water because due to the refraction at water and air interface, the fish appears to be raised, and seems to be close to the surface this is called ‘apparent depth’. The shooter aims the gun at apparent position of the fish, instead of real position.
How do you hit a fish underwater?
If the fish is directly below you, aim directly at it. If the fish is near the surface of the water, aim directly at it. Otherwise, aim below the fish, getting farther below it the further away the fish is, and the deeper in the water it is. If you are aiming a gun, STOP RIGHT NOW.
Should you aim above or below a fish?
You always want to aim below the fish because the refraction of light makes the fish appear closer to the surface than they are. The distance that you aim depends on how far away you are from the fish, and how deep the fish is in the water.
When the boy throws the spear he will miss the fish Why?
If the fisherman aims at the center of the fish the spear will miss! As the light from the fish leaves the water it bends away from the normal (right angled line to the surface). This makes the fish appear to be nearer to the surface and further away because your eye assumes light travels in a straight line.
What property of light makes it difficult for the person to spear the fish?
We now know that a light ray travelling from air to water will be refracted (change direction) and so too will light from water to air. This means that if you are trying to spear a fish in the water . . . . . .
Why does a fish look closer in water?
Light rays reflected from the fish are refracted at the surface of the water, but the eyes and brain trace the light rays back into the water as thought they had not refracted, but traveled away from the fish in a straight line. This effect creates a “virtual” image of the fish that appears at a shallower depth.
What is the refractive index of water?
Some typical refractive indices for yellow light (wavelength equal to 589 nanometres [10−9 metre]) are the following: air, 1.0003; water, 1.333; crown glass, 1.517; dense flint glass, 1.655; and diamond, 2.417.
What is the meaning of Pierce?
to penetrate into or run through (something), as a sharp, pointed dagger, object, or instrument does. to make a hole or opening in. to bore into or through; tunnel. to perforate.
Why does the stick immersed into water look bent?
So, when the rays of light pass from a rarer medium to the denser medium they move towards the normal, the part of stick immersed in water appears to bend when immersed in water and this refraction causes an apparent shift in the position of the part of the rod within the water.
What does a fish see when it looks towards the sky?
Outside the sky circle the fish sees a reflection of the sea bed and objects in the water. The surface totally internally reflects upward going rays within the water making an angle of more than 49° to the vertical.
Why are things blurry underwater physics?
Physicist: The speed of light depends on the medium it moves through. So as light moves from air to glass, for example, it slows down. When the boundary between mediums is slanted, one side of the wave changes speed first, causing the wave to “swing around”. …