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NISA [10]
3 years ago
10

A child is riding in a wagon. What reference frame might have been used if an observer said the child was not moving.

Physics
1 answer:
GarryVolchara [31]3 years ago
3 0

Answer:

the wagon should be used as frame of reference if an observer said the child was not moving.

Explanation:

The state of motion of a body depends upon the frame of reference. It is the set of co-ordinates according to which the motion is analyzed. If a child is riding in a wagon, then he will be considered in motion to a person standing outside the wagon. Hence, if we take a frame of reference outside the wagon then the child must be in motion with respect to the observer. On the other hand if the observer is inside the wagon, then the child must be in rest with respect to the observer. Hence, if we take the wagon to be the frame of reference, then the child will be at rest with respect to the observer.

<u>Therefore, the wagon should be used as frame of reference if an observer said the child was not moving.</u>

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A ray of light is moving from a material having a high indexof refraction into a material with a lower index of refraction.
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n_1 sin \theta_1 = n_2 sin \theta_2

where we have:

n1, n2: index of refraction of the first and second medium

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Here, the light ray moves from a material with high index of refraction to a material with lower index, so we have

n_1 > n_2

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sin \theta_2 = \frac{n_1}{n_2} sin \theta_1

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\frac{n_1}{n_2}>1

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sin \theta_2 > sin \theta_1\\\theta_2 > \theta_1

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\lambda=\frac{\lambda_0}{n}

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The equation can be rewritten as

\lambda_0 = \lambda_1 n_1 = \lambda_2 n_2

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\lambda_2 = \frac{n_1}{n_2} \lambda_1

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(c) The frequency remains the same

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