Light Flashcards

(17 cards)

1
Q

Angle of incidence

A

The angle between the incident ray and the normal

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2
Q

Angle of reflection

A

The angle between the reflected ray and the normal

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3
Q

Angle of refraction

A

The angle between the refracted ray and the normal

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4
Q

Critical angle

A

The angle of incidence when the refracted ray is at 90° to the normal

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5
Q

Diffuse reflection

A

When light is reflected off a rough surface. Light is scattered from diffuse reflection

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6
Q

Incident ray

A

The ray of light strikes a surface. The incoming ray of light

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7
Q

Lateral inversion

A

The reversal of the mirror image from left to right. Image in mirror as been flipped laterally

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8
Q

Law of reflection

A

The angle of incidence is equal to the angle of reflection

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9
Q

Normal

A

A line which is perpendicular to a mirror or reflective surface

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10
Q

Plane mirror

A

A smooth flat surface which reflect light

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11
Q

Reflected ray

A

A ray of light which has been reflected off a surface

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12
Q

Refracted ray

A

A ray of light that has been refracted as it passes through a different substance with a different density

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13
Q

Refraction

A

The bending of light as it travels from one substance to another. Refraction occurs as light travels through different substances or mediums at different speeds. Occurs when light passes through a different substance at an angle. When light travels from a substance with a higher refractive index(higher density) to a lower refractive index(lower density), light refracts or bends away from the normal, vise versa

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14
Q

Refractive index

A

A number which indicates the density of a substance. Measured by speed of light in vacuum divided by speed of light in substance

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15
Q

Regular reflection

A

When a light ray is reflected off a smooth flat surface, the angle of incidence will equal the angle of reflection.

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16
Q

Total internal reflection

A

When the angle of incidence is greater than the critical angle. This causes light to reflect instead of refraction through to the next medium.

17
Q

Virtual image

A

A virtual image is produced when rays of light reach our eyes that appear to come from a real object, but there is in fact no object at the apparent source of the light. The most common example is when light from an object strikes a simple plane mirror