Week 1 Flashcards

1
Q

What are the subdivisions of the angles that are measured in degrees?

A

1* = 60’ = 3600’’

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2
Q

1 radian is equal to?

A

180*/pi = 206265’’

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3
Q

What is intrinsic luminosity?

A

Total energy emitter per unit time

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4
Q

What is the equation for parallax method?

A

Tan p = 1AU/d if p is very small then p= 1AU/d

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5
Q

Parallax equation in terms of parsecs?

A

p(Arcsec) = 1/d(pc)

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6
Q

What is flux?

A

Amount of energy being received per unit area per unit time

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7
Q

Flux and intrinsic luminosity are related by?

A

F=L/4pid^2

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8
Q

What stars are brighter, ones with lower or higher magnitude?

A

Stars with lower apparent magnitude are brighter than stars with higher apparent magnitudes

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9
Q

What is the absolute magnitude (M)?

A

Defined to be the apparent

Magnitude that a str would have if placed at a distance of 10parsecs from the Earth

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10
Q

Which stars are hotter blue or red?

A

Blue stars are hotter than red stars

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11
Q

What is the sensitivity range for UV?

A

300-400nm

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12
Q

What is the range for blue?

A

350-550nm

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13
Q

What range is visual?

A

480-650nm

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14
Q

What is the effective temperature?

A

Defined to be the temperature that a str with biometric luminosity would have if it were a perfect black body.

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15
Q

What are the subdivisions of the angles that are measured in degrees?

A

1* = 60’ = 3600’’

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16
Q

1 radian is equal to?

A

180*/pi = 206265’’

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17
Q

What is intrinsic luminosity?

A

Total energy emitter per unit time

18
Q

What is the equation for parallax method?

A

Tan p = 1AU/d if p is very small then p= 1AU/d

19
Q

Parallax equation in terms of parsecs?

A

p(Arcsec) = 1/d(pc)

20
Q

What is flux?

A

Amount of energy being received per unit area per unit time

21
Q

Flux and intrinsic luminosity are related by?

A

F=L/4pid^2

22
Q

What stars are brighter, ones with lower or higher magnitude?

A

Stars with lower apparent magnitude are brighter than stars with higher apparent magnitudes

23
Q

What is the absolute magnitude (M)?

A

Defined to be the apparent

Magnitude that a str would have if placed at a distance of 10parsecs from the Earth

24
Q

Which stars are hotter blue or red?

A

Blue stars are hotter than red stars

25
Q

What is the sensitivity range for UV?

A

300-400nm

26
Q

What is the range for blue?

A

350-550nm

27
Q

What range is visual?

A

480-650nm

28
Q

What is the effective temperature?

A

Defined to be the temperature that a str with biometric luminosity would have if it were a perfect black body.

29
Q

What are the subdivisions of the angles that are measured in degrees?

A

1* = 60’ = 3600’’

30
Q

1 radian is equal to?

A

180*/pi = 206265’’

31
Q

What is intrinsic luminosity?

A

Total energy emitter per unit time

32
Q

What is the equation for parallax method?

A

Tan p = 1AU/d if p is very small then p= 1AU/d

33
Q

Parallax equation in terms of parsecs?

A

p(Arcsec) = 1/d(pc)

34
Q

What is the effective temperature?

A

Defined to be the temperature that a str with biometric luminosity would have if it were a perfect black body.

35
Q

What range is visual?

A

480-650nm

36
Q

What is the range for blue?

A

350-550nm

37
Q

What is the sensitivity range for UV?

A

300-400nm

38
Q

Which stars are hotter blue or red?

A

Blue stars are hotter than red stars

39
Q

What is the absolute magnitude (M)?

A

Defined to be the apparent

Magnitude that a str would have if placed at a distance of 10parsecs from the Earth

40
Q

What stars are brighter, ones with lower or higher magnitude?

A

Stars with lower apparent magnitude are brighter than stars with higher apparent magnitudes

41
Q

Flux and intrinsic luminosity are related by?

A

F=L/4pid^2

42
Q

What is flux?

A

Amount of energy being received per unit area per unit time