Physics Refraction Principles

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Questions and Answers

What does a higher index of refraction indicate?

Light bends towards the normal
Both B and C (correct)
Light travels faster in the medium
Light travels slower in the medium

If the index of refraction is less than one, the refracted ray will bend away from the normal.

False (B)

What is the speed of light in water as given in the content?

1.96 x 10^8 m/s

When light travels from air to a medium with a higher index of refraction, it bends ______.

towards the normal Signup and view all the answers

Match the following scenarios with their resulting actions of light:

n < no = Refracted ray bends towards the normal n > no = Refracted ray bends away from the normal n = no = No bending of light normal = Perpendicular to the surface Signup and view all the answers

What type of image is formed by rays that appear to come from behind the mirror?

Virtual image (C) Signup and view all the answers

A real image is formed by rays that do not converge at a certain location.

False (B) Signup and view all the answers

Where do the rays appear to come from in a virtual image?

Behind the mirror Signup and view all the answers

A virtual image is formed by rays that _______ actually converge at a certain location.

do not Signup and view all the answers

Match the type of image with its description:

Virtual image = Appears to be behind the mirror Real image = Formed by converging rays Concave mirror = Curves inward Convex mirror = Makes images appear smaller Signup and view all the answers

Which statement is true regarding a concave mirror?

It can form both real and virtual images. (D) Signup and view all the answers

In the context of mirrors, what happens to rays that converge?

They meet at a certain location. Signup and view all the answers

What will happen to light rays that go through the focus when they reflect?

They will reflect back through the center of curvature. (C) Signup and view all the answers

Light rays traveling parallel to the principal axis will reflect through the focus.

True (A) Signup and view all the answers

What is the term for the point where light rays converge in a lens system?

Focus Signup and view all the answers

The center of __________ is where light rays reflect back through in a lens.

curvature Signup and view all the answers

Match the following terms with their definitions:

Focus = Point where rays converge Vertex = Edge of the lens or mirror Principal Axis = Line through the focus and center of curvature Center of Curvature = Center of the circular path of the lens or mirror Signup and view all the answers

What does the principal axis represent in a lens system?

The line that runs through the focus and the center of curvature. (A) Signup and view all the answers

The vertex is the highest point in a lens system.

False (B) Signup and view all the answers

What happens to light rays that pass through the vertex?

They will continue in a straight line. Signup and view all the answers

Light rays that travel through the __________ will reflect parallel to the principal axis.

focus Signup and view all the answers

What will light that travels along the principal axis do?

Reflect back on themselves (D) Signup and view all the answers

Light parallel to the principal axis will not reflect through the focus.

False (B) Signup and view all the answers

What is the term for the line where the light rays converge in a lens or mirror system?

Principal Axis Signup and view all the answers

Light that travels parallel to the PA will reflect through the ______.

focus Signup and view all the answers

Match the following components with their functions:

Focus = Point where light rays converge Vertex = The tip of the reflective surface Center of Curvature = The center of the sphere from which a mirror is made Principal Axis = Line of symmetry of the lens or mirror Signup and view all the answers

Which term refers to the point where the light rays reflect?

Focus (D) Signup and view all the answers

The center of curvature is aligned with the focus in a concave mirror.

True (A) Signup and view all the answers

What happens to light rays parallel to the principal axis after reflection?

They reflect through the focus. Signup and view all the answers

The ______ is the point where light rays diverge after reflection.

focus Signup and view all the answers

Which component serves as the symmetry line in a lens or mirror system?

Principal Axis (A) Signup and view all the answers

Flashcards

Speed of Light (c)

The speed of light in a vacuum, denoted by 'c', is a fundamental constant in physics and is approximately 3 x 10⁸ m/s.

Index of Refraction (n)

The index of refraction (n) of a medium is a measure of how much light bends when it passes from a vacuum into that medium. It is calculated by dividing the speed of light in a vacuum by the speed of light in the medium.

Refraction - Bending Away From the Normal

When the index of refraction of a medium is greater than the index of refraction of the surrounding medium, the refracted ray bends away from the normal line.

Refraction - Bending Towards the Normal

When the index of refraction of a medium is less than the index of refraction of the surrounding medium, the refracted ray bends toward the normal line.