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Physics > Chapter 12 > Flashcards

Chapter 12 Flashcards

1
Q

What is light?

A

Light is a form of energy that travels by electromagnetic waves

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2
Q

What is reflection of light?

A

Reflection of light is the bouncing of light off an object

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3
Q

What is diffuse reflection?

A

Diffuse reflection occurs when light is reflected in all directions from a rough surface

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4
Q

What is regular reflection?

A

Regular reflection occurs when light reflects off the surface of a smooth object - light is all reflected in one direction

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5
Q

What is an incident ray?

A

An incident Ray is the ray of light falling onto the mirror (from an object or light source)

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6
Q

What is a normal?

A

A normal at the point of incidence is an imaginary line radiating perpendicularly from the mirror at the point where the incident ray strikes the mirror

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7
Q

What is a reflected ray?

A

A reflected ray is the ray of light bouncing off the mirror

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8
Q

What is the angle of incidence?

A

The angle of incidence is the angle between the normal and incident ray

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9
Q

What is the angle of reflection?

A

The angle of reflection is the angle between the normal and reflected ray

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10
Q

What is an object?

A

An object is what the rays of light have come from directly prior to striking the mirror

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11
Q

What is an image?

A

An image is the location from which the rays of light appear to be coming from

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12
Q

What is the object distance

A

The object distance is the distance between the mirror and the object

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13
Q

What is the image distance?

A

The image distance is the distance between mirror and image

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14
Q

What is parallax?

A

Parallax is the apparent movement of one object relative to another due to the motion of the observer

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15
Q

What is a magnified image?

A

An image is magnified if it’s height is greater than that of the object

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16
Q

What is a diminished image?

A

An image is diminished if it’s height is less than that of the object

17
Q

What is an inverted image?

A

An image is inverted when it is upside down

18
Q

What is an erect image?

A

An image is erect when it is the same side up

19
Q

What is a laterally inverted image?

A

An image is laterally inverted when the right side of the object is on the left side of the image and vice versa

20
Q

What is a real image?

A

A real image is the actual intersection of light rays

21
Q

What is a virtual image

A

A virtual image is the apparent intersection of light rays

22
Q

What is the pole of a mirror?

A

The pole of a spherical mirror is its centre point

23
Q

What is the centre of curvature?

A

The centre of curvature of the mirror is the centre of the sphere from which the mirror is made

24
Q

What is the principal axis?

A

The principal axis is the straight line joining the pole to the centre of curvature

25
Q

What is the focus or focal point?

A

The focus of focal point is the point halfway between the centre of curvature and the pole

26
Q

What is the focal length?

A

The focal length is the distance from the focus to the pole

27
Q

What are the laws of reflection?

A
  1. The incident ray, normal (at the point of incidence and reflected ray are all in the same plane
  2. The angle of reflection (r) is equal to the angle of incidence

Physics (21 decks)

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