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Question 1:

According to the law of reflection, the angle of incidence is equal to the angle of:

A) Reflection
B) Refraction
C) Incidence
D) Diffraction

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Explanation: The correct answer is A) Reflection. According to the law of reflection, the angle of incidence is equal to the angle of reflection. This means that the incoming light ray and the reflected light ray make the same angle with the normal to the surface of reflection.

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Question 2:

When light travels from a less dense medium to a more dense medium, the angle of refraction is:

A) Smaller than the angle of incidence
B) Larger than the angle of incidence
C) Equal to the angle of incidence
D) It depends on the refractive index

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Explanation: The correct answer is A) Smaller than the angle of incidence. When light travels from a less dense medium to a more dense medium, the angle of refraction is smaller than the angle of incidence. This bending of light is a result of the change in speed as the light enters the new medium.

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Question 3:

When light travels from a more dense medium to a less dense medium, the angle of refraction is:

A) Smaller than the angle of incidence
B) Larger than the angle of incidence
C) Equal to the angle of incidence
D) It depends on the refractive index

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Explanation: The correct answer is B) Larger than the angle of incidence. When light travels from a more dense medium to a less dense medium, the angle of refraction is larger than the angle of incidence. This bending of light is again due to the change in speed as the light exits the denser medium.

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Question 4:

The angle of incidence is measured between the incident light ray and the:

A) Normal
B) Reflected light ray
C) Refracted light ray
D) None of the above

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Explanation: The correct answer is A) Normal. The angle of incidence is the angle between the incident light ray and the normal to the surface of reflection or refraction. It is measured from the direction perpendicular to the surface.

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Question 5:

The angle of reflection is measured between the reflected light ray and the:

A) Normal
B) Incident light ray
C) Refracted light ray
D) None of the above

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Explanation: The correct answer is A) Normal. The angle of reflection is the angle between the reflected light ray and the normal to the surface of reflection. It is measured from the direction perpendicular to the surface.