When a ray of light falls on sea shell, its small amount gets refracted (slightly polarized) and rest almost gets reflected back (fully polarized). So it gets a golden view because of polarization.

Correct Option: C

When a ray of light falls on sea shell, its small amount gets refracted (slightly polarized) and rest almost gets reflected back (fully polarized). So it gets a golden view because of polarization.

Let the original length be L; area of cross-section be A; and the resistivity be ?.
So, R = ?L/A
When the wire is melted and length is made half, i.e.
L/ = L/2, the area of cross-section A/ is such that,
AL = A/L/ (volume of the wire remains constant)
=> AL = A/(L/2)
=> A/ = 2A
Now, the new resistance is,
R/ = ?L//A/ = ?(L/2)/(2A)
=> R/ = R/4
Thus, the new resistance is one-fourth of the original resistance.

Correct Option: A

Let the original length be L; area of cross-section be A; and the resistivity be ?.
So, R = ?L/A
When the wire is melted and length is made half, i.e.
L/ = L/2, the area of cross-section A/ is such that,
AL = A/L/ (volume of the wire remains constant)
=> AL = A/(L/2)
=> A/ = 2A
Now, the new resistance is,
R/ = ?L//A/ = ?(L/2)/(2A)
=> R/ = R/4
Thus, the new resistance is one-fourth of the original resistance.

The Planck constant has dimensions of physical action; these are the same as those of angular momentum, i.e., energy multiplied by time, or momentum multiplied by distance. In SI units, the Planck constant is expressed in joule seconds (J·s) or (N·m·s).

Correct Option: A

The Planck constant has dimensions of physical action; these are the same as those of angular momentum, i.e., energy multiplied by time, or momentum multiplied by distance. In SI units, the Planck constant is expressed in joule seconds (J·s) or (N·m·s).

It is possible to transform unpolarized light into polarized light. A light wave that is vibrating in more than one plane is referred to as unpolarized light. Polarized light waves are light waves in which the vibrations occur in a single plane. The process of transforming unpolarized light into polarized light is known as polarization.

Correct Option: D

It is possible to transform unpolarized light into polarized light. A light wave that is vibrating in more than one plane is referred to as unpolarized light. Polarized light waves are light waves in which the vibrations occur in a single plane. The process of transforming unpolarized light into polarized light is known as polarization.

As we know

= 1 -		v		2	= 1 -		m - 4m		2
		u					m + 4m

Correct Option: D

As we know

= 1 -		v		2	= 1 -		m - 4m		2
		u					m + 4m