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slega [8]
3 years ago
14

Which statement about how light travels is true?

Physics
2 answers:
Misha Larkins [42]3 years ago
7 0

The correct answer to the question is - A). Light waves can travel in a vacuum and travel at a constant speed even if the light source is moving.

EXPLANATION:

Before going to answer this question, first we have to understand the fundamental postulate of quantum mechanics.

As per the fundamental postulate of quantum mechanics, the speed of light is always constant irrespective of the nature of frame of reference i.e speed of light is same both in inertial and non-inertial frame of reference. It is independent of the velocity of source also.

Again we know that light is an electromagnetic wave. Hence, it won't require any medium for its propagation. It can travel in space or vacuum also.

Hence, the correct option out of four options is that light waves can travel in a vacuum and travel at a constant speed even if the light source is moving.



Ad libitum [116K]3 years ago
4 0
Out of the choices given, the statement about how light travels is "Light waves can travel in a vacuum and will travel at a constant speed even if the light source is moving.
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The direction of applied force has to be .............. to the distance in order to say work is done​
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Answer:

Parallel

Explanation:

The work done is defined as the force applied on an object and the displacement in the position of the object in the direction of force.

W = F s cos A

where, F is the force, s is the displacement and A is the angle between force and displacement.

When the angle between the force and the displacement is 90 degree, the work done is zero.

To get the maximum work the angle between the force and the displacement is 0 degree.

So, to get the work done by the force the angle between the force and displacement is 0 degree that means the force and displacement is parallel to each other.

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3 years ago
When do we say a curvilinear motion is accelerated?​
mel-nik [20]

Answer:

There always is an acceleration in a curvilinear motion, as the velocity vector changes, so always.

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3 years ago
Which combination of units can be used to express the magnetic field?
Zolol [24]

Answer:

The magnetic field unit in the International System is the tesla (T). A tesla is defined as the magnetic field that exerts a force of 1 N (newton) on a load of 1 C (coulomb) that moves at a speed of 1 m / s within the field and perpendicular to the field lines

Explanation:

Magnetic induction or magnetic flux density (B), is the magnetic flux that causes a diffusion charge in motion for each unit of normal area to the direction of the flow. It is also called the magnetic field strength.

The unit of magnetic flux density in the International System of Units is the tesla (T).

The tesla (symbol T), is the magnetic induction unit (or magnetic flux density) of the International System of Units (SI). It is defined as a uniform magnetic induction that, normally distributed over a surface of one square meter, produces through this surface a total magnetic flux of a weber.

<u>Equivalences: </u>

1 T = 1 Wb · m-2 = 1 kg · s-2 · A-1 = 1 kg · C-1 · s-1

A Tesla is also defined as the induction of a magnetic field that exerts a force of 1 N (newton) on a load of 1 C (coulomb) that moves at a speed of 1 m / s within the field and perpendicular to the lines of magnetic induction.

1 T = 1 N · s · m-1 · C-1

Basic Unit in the Cegesimal System of Units (CGS): Gauss (G)

A gauss (G) is a magnetic field unit of the Cegesimal System of Units (CGS). A gauss (G) is defined as a maxwell per square centimeter.

1 gauss = 1 maxwell / cm2

A gauss is equivalent to 10-4 tesla:

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4 years ago
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Sound. Hope I helped! C=
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A.) stability of an atom

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