light Flashcards

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1
Q

what is light

A

light is an electromagnetic radiation which causes the sense of vision

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2
Q

What is rectilinear propagation of light

A

The tendency of light to propagate in straight lines

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3
Q

What is the reflection of light

A

The bouncing back all scattering of flight from the surface of an object that is placed in the path

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4
Q

Types of reflections

A

Regular reflection and its regular reflection

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5
Q

What is incident ray

A

The ray that hits the surface of the plane mirror

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6
Q

What is reflected ray

A

The ray that gets reflected of the surface

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7
Q

How can we see the reflection of the surrounding in water bodies

A

The still water is able to reflect light because of the smooth

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8
Q

Explain regular reflection

A

The reflection of light rays from a plane and uniform surface

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9
Q

Explain irregular reflection

A

The reflection of light rays from a rough and nonuniform surface

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10
Q

Types of images

A

Real image and virtual image

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11
Q

What is a real image

A

A real images formed when light rays coming from an object meet each other at a particular point after reflection

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12
Q

What is virtual image

A

A virtual images formed when the light race coming from an object does not appear to meet each other

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13
Q

What is lateral inversion

A

Phenomenon in which the left hand side of an object appears at right hand side of in object in a plane mirror and vice versa

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14
Q

What are spherical mirrors

A

Made with has the shape of a piece cut out of a hollow glassware with one side polished or reflected surface

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15
Q

Types of spherical mirror

A

Concave and convex

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16
Q

Concave mirror

A

If the part of the mirror that curves in word is polished and serve as the reflecting surface then it’s called a concave mirror

17
Q

Convex mirror

A

If the part of the mirror that curves outwards is polished in serves as the reflecting surface it is called a convex mirror

18
Q

Characteristics of concave mirror

A

Producers real image
Converges light rays

19
Q

Characteristics of a convex mirror

A

Producers of virtual image
Light race diverges

20
Q

Uses of plane mirror

A

Used to make different optical devices such as Periscope in kaleidoscope
Used to see ourselves that various places

21
Q

Uses of convex mirror

A

Used as rear view mirrors in vehicles to look over the wider area

Used in various places like shop parking lots in order to keep a watch over large areas for security reasons

22
Q

Uses of a concave mirror Mirror

A

Used as shaving mirrors

Used by dentist to magnify the small parts of the teeth

Used as a reflector in various devices such as torch lights car headlights etc

23
Q

What is a lens

A

A lens is a transparent medium or substance bounded by two surfaces of which at least one is curved

24
Q

What is the use of lens

A

Islands is used to bend the light rays as the pass through it, that means the light rays apus to come from a point which is closer or further instead of the actual place of origin

25
Q

Types of lenses

A

Concave lenses and convex lenses

26
Q

What are concave lenses

A

A Concave or diverging lens is thin in the middle and thicker at the edges. It diverges the light rays when passed through

27
Q

What kind of image does a concave lens produce

A

Virtual and upright images