Polar refers to the north and south poles. The poles are also the centers of the magnetic field that is around the Earth.

When water's chemical structure is drawn, the two hydrogen atoms do not bond in a straight line with the oxygen atom, but rather form a Micky Mouse shape. Additionally, the hydrogen atoms have a positive charge when bonded, while the oxygen atom tends to have a negative charge. Because of the irregular shape, combined with the difference in charges, the negative end has a tendency to stick out and cause one side of the molecule to be negative, and the other positive. This difference in charges on each side of a molecule is called polarity, but it can be applied to water specifically.

Incidentally, water also has a tendency to group together due to its polarity, forming hydrogen bonds with itself and other polar molecules. This is the reason for the phenomena that is surface tension; the water forms a net of sorts because the negative end on one molecule is attracted to the positive end on another.

Blurriness is caused by the light being too scattered upon the retina or the light not quite reaching the retina. So squinting blocks some of the light and may bend some of it as well.

In some cases, you might be able to squint hard enough to push in the cornea some, which would help with nearsightedness and some cases of astigmatism.

Calcite is birefractive which means that its refractive index depends on the polarisation and direction of propagation of the light that reaches it. For more introductory information please see the wikipedia article about this substance.

2 (no units)

The reason white light is separated into colors is because light of different colors have slightly different indices of refraction. Thus, for example, red light might be bent a little bit more than blue light.

Yes.

2 x 108 ms-1

It is refraction

Refraction of sunlight by raindrops, the refraction depending upon wavelength to produce the colors

a mirage

Light is usually unpolarized, it becomes polarized when it passes through a polarizing filter.

Light can be polarized because it travels as a transverse wave (of oscillating electric and magnetic fields) orthogonally to the direction of the medium in all directions, and polarizing filters polarize light in one plane.

Polarized filters in the vertical plane only allow light in the vertical plane to pass through.

Ex. polarized sunglasses have a polarizing filter in the vertical plane in order to minimize glare which is polarized light in the horizontal plane.

and yes polarizing filters can be rotated to polarize light in other planes as well.

yes light changes its direction when it passes form air to glass due to refraction of light coz air has less density n glass is a solid so it has more density due to that when light goes form air to glass then its speed decreases n its always bends towords the normal. but if light will go perpendicularly form air to glass then it will not change its direction.

This is because of the speed of light getting reduced as it enters into the denser medium.

Think of the FRONT of the wave as it enters a more-dense medium at an angle,

and its speed decreases. Vizualize it in very slow motion:

-- The wave-front arrives at angle, so part of it is across the boundary and into

the new medium, while part of it is still out in the old medium.

-- The part of the wave-front in the new medium is traveling slower, while the

part that hasn't quite reached the boundary yet is still out in the old medium

and traveling faster.

-- If your vizualization is running accurately, this action is causing the whole

wave-front to turn, becoming more parallel with the boundary, and its direction

of motion turning toward the normal.

In polarized light, the plane of the electrical (and magnetic) oscillations is the same for all photons (particles of light). For example, if the light is traveling away from you, all photons might have electrical oscillations that go up and down.

Optical fibers transmit signals over long distances by a process called total internal reflection. In this process, optical fibers bend light by bouncing pulses of light along their inner walls, which enables the pulses of light to travel quickly over long distances.

For more information, refer to the related link below.

they r erect,virtual,deminished and independent of distance.

Light travels faster in liquid material with a higher index or reflection.

Circularly polarized light is obtained by adding two plane polarized lights of same intensity that are orthogonal but with a phase difference of 90 degrees.

it is the study that deals with the optical waves.

while the optical wave is nothing but the light wave itself or can be called EM-waves(electromagnetic waves).

at cases study include the uv, infrared and radio waves

Is this Jeopardy?

OK I'll bite = "What is...a mirage?"

Absorption

laws of refraction are as follows:=1) the incident ray, refracte dray and the normal at the point of incidence all lie on the same plane.==2) the sine of the angle of incidence to the sine of angle of refraction is a constant.this is also called the snell's law.=

Red light does.