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PHYS 130 > Lenses and Optics > Flashcards

Lenses and Optics Flashcards

1
Q

The sign convention for R for a concave lens will be greater than or less than zero?

A

For a concave lens side the radius(R) will be negative

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2
Q

The sign convention for R for a convex lens will be greater than or less than zero?

A

For a convex lens side the radius(R) will be positive

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3
Q

In a converging lens the centre of the lens will be thicker than the edges or thinner?

A

In a converging lens the centre will be thicker than the edges.

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4
Q

In a diverging lens, the centre of the lens will be thicker or thinner than the edges?

A

The diverging lens will have a centre that is thiner then the edges.

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5
Q

What is a plano convex/concave lens/mirror

A

it is where one of the sides has a radius of curvature = inf

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6
Q

What is the Lensmaker’s equation?

A

1/f = (n-1)(1/R1+1/R2)

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7
Q

The focal point for a converging lens will be positive or negative?

A

Positive

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8
Q

The focal point for a diverging lens will be positive or negative?

A

Negative

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9
Q

What is the Thin-lens equation

A

1/f = 1/v+1/u

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10
Q

What is the formula for Angular magnification

A

M = theta’/theta

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11
Q

What is the formula for maximum magnification?

A

Mmax = 1 + d/f

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12
Q

What is the formula for minimum magnification?

A

Mmin = d/f

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13
Q

What is Hyperopia

A

It is a far-sighted disorder where you can see far but not close

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14
Q

With what type of lens is Hyperopia treated with?

A

A converging lens

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15
Q

What is Myopia

A

It is a near-sighted disorder where you can see close but not far.

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16
Q

With what type of lens is Myopia treated with?

A

A diverging lens

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17
Q

When looking at someone lenses to treat Myopia, will their face look bulged or shrunk?

A

Their face will look shrunk.

18
Q

When looking at someone lenses to treat Hyperopia, will their face look bulged or shrunk?

A

Their face will look bulged

19
Q

What are the lenses used in a compound microscope?

A

The first is the eye lens and the second is the objective lens.

20
Q

In a compound microscope, the object is placed near what lens?

A

the objective lens.

21
Q

What type of lenses do compound microscopes use?

A

Two converging lenses.

22
Q

Maximum total Magnification is calculated by what equation

A

M = -L/fo(1+d/fe) where L is the tube length and fo indicates that the object is precicly at the focal length.

23
Q

What is Chromatic aberration?

A

It is where the index of refraction of a material varies with the wavelength of the light that passes through it.

24
Q

In a lens or mirror equation, ‘O’ represents what?

A

The object height

25
Q

In a lens or mirror equation, ‘I’ represents what?

A

The image height

26
Q

In a lens or mirror equation, ‘u’ represents what?

A

The object distance

27
Q

In a lens or mirror equation, ‘v’ represents what?

A

The image distance

28
Q

Magnification is is calculated through what formula

A

M = -v/u = I/O

29
Q

The sign convection for v will be greater than or less than zero for real images?

A

Greater than zero.

30
Q

The sign convection for v will be greater than or less than zero for virtual images?

A

Less than zero

31
Q

The sign convection for I will be greater than or less than zero for upright images?

A

Greater than zero

32
Q

The sign convection for I will be greater than or less than zero for inverted images?

A

Less than zero

33
Q

The sign convection for Magnification(M) will be greater than or less than zero for inverted images?

A

Less than zero

34
Q

The sign convection for Magnification(M) will be greater than or less than zero for upright images?

A

Greater than zero

35
Q

For a concave mirror, an object inside the focal point will make what type of image?

A

It will create a virtual image that is larger.

36
Q

For a concave mirror, an object between the centre of curvature and the focal point will make what type of image?

A

It will create a real image that is inverted and larger than the object.

37
Q

For a concave mirror, an object at the centre of curvature(C) point will make what type of image?

A

It will create a real image that is inverted but exactly the same as the object in height.

38
Q

For a concave mirror, an object at the focal point will make what type of image?

A

It will not create any image

39
Q

What type of image does a convex mirror make when the object is placed at any distance from the mirror

A

At any distance expect exactly in-front of the mirror it will create a virtual image that is upright and smaller. As the object is moved farther away from the mirror the image slowly approaches the focal point of the mirror

40
Q

For any type of mirror, v will be positive or negative for a virtual image?

A

negative

41
Q

The focal point for a convex mirror will be positive or negative?

A

negative

PHYS 130 (4 decks)

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