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Optics > Light and Reflection > Flashcards

Light and Reflection Flashcards

1
Q

What is optics?

A

The study of light

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2
Q

What is light?

A

A form of energy belonging to the electromagnetic spectrum

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3
Q

What is the speed of light and how long does it take to get to Earth?

A

3×10⁸m/s and 500s

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4
Q

How would you show light is a form of energy?

A

You’d use a Crooke’s radiometer or photocell to show energy conversion

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5
Q

How does light travel?

A

In straight lines

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6
Q

What are the types of light beams?

A

Converging, diverging and parallel beams

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7
Q

What are converging beams?

A

Beams of light that go inwards, they can come together and meet

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8
Q

What are diverging light beams?

A

Beams of light that go outward, they don’t meet

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9
Q

What is reflection?

A

The bouncing of light off of objects

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10
Q

What is diffuse reflection?

A

Light hitting an uneven surface and scattering in all directions

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11
Q

State the laws of reflection of light.

A
  1. The incident ray, normal at the point of incidence and reflected ray all lie on the same plane.
  2. The angle of incidence is equal to the angle of reflection
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12
Q

What is the incident ray?

A

The light ray coming at something (such as a mirror or prism)

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13
Q

What is the reflected ray?

A

The light ray leaving the object (such as a mirror)

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14
Q

What is specular reflection?

A

The bouncing of light off a smooth surface such as a mirror, glass or water

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15
Q

What is the image formed in a mirror called?

A

A virtual image

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16
Q

What is a real image?

A

An image formed be the actual intersection of light rays, it can be seen on a physical screen

17
Q

What is a virtual image?

A

An image formed by the apparent intersection of light rays, cannot be seen on a physical screen

18
Q

What is steriopsis?

A

The gaining of information from both eyes and the use of both sets of information to enhance depth perception

19
Q

What is parallax?

A

The difference in the apparent position of an object viewed along two different lines of sight

20
Q

What is lateral inversion?

A

The reversal of left and right in a mirror

21
Q

What are some uses of plane mirrors?

A

Periscopes, binoculars and viewing yourself

Optics (4 decks)

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