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Physics Exam 2 > Physics Exam 2 > Flashcards

Physics Exam 2 Flashcards

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1
Q

What is the refraction of light

A

Absorption of light/ dense transverse

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2
Q

Which type of telescope uses a lender as a main obstacle elements

A

Refracting telescope

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3
Q

Light gathering power of a telescope is related directly to the

A

primary Mirror or lens

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4
Q

A typical reflecting telescope is made up of

A

A long focal length front /short focal length rear

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5
Q

What happens when he being white light is passed through a prism of glass

A

Different colors / different angles to produce a spectrum

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6
Q

When white light passes through a prism which wavelength of light or deflected most by the glass

A

Shorter wavelengths

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7
Q

A Newtonian telescope consist of which of the following combination of optical elements

A

concave /one flat mirror

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8
Q

One major difference between radio waves and light is that

A

Radio waves have a shorter wavelength

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9
Q

How does angular resolutions for giving diameter of telescope depend on wavelength

A

Resolution worsens as wavelength increases

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10
Q

Main reason for combining many radio telescopes together into a interferometer with large distance between telescopes

A

sharper image /sources

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11
Q

Two ranges of electromagnetic

A

Visible and radio

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12
Q

What range of wavelengths does the Hubble space telescope operate

A

Infrared, visible & ultraviolet

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13
Q

High-energy telescope to take the radiation at the high energy and of the electromagnetic spectrum namely

A

X-rays & gamma rays

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14
Q

And electromagnetic wave has a wave of 80 cm

A

Radio Wave

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15
Q

How many stars are in our solar system

A

1

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16
Q

The overall shape of the orbit

A

Slightly elliptical but nearly circular

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17
Q

Best way to measure the mass of the planet is to measure

A

Size & rotational speed

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18
Q

The mean density of a planet is

A

mass divided by volume

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19
Q

Which planet does not have natural satellites

A

Venus & Mercury

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20
Q

The astroid belt exist between the orbits of which planets

A

Mars & Jupiter

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21
Q

Pluto is classified as a

A

Minor planet

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22
Q

The most common elements in the universe are

A

Equal hydrogen and helium / small amounts of heavier elements

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23
Q

Hydrogen and helium account for

A

98%

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24
Q

Which following Chemical elements is relatively rare

A

Gold

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25
Q

Our solar system seems to have formed about how long ago

A

5 billion years

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26
Q

When dealing with radioactive decay of materials we often read about the age of a particular rock

A

age of Atoms within the rock

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27
Q

Radioactive decay in Atom occurs because the

A

unstable nucleus by exposure to the nuclear reactions

28
Q

What was the form of the material from which the solar system formed

A

A nebula made mostly of hydrogen and helium gas ( supernova explosions)

29
Q

Most probable theory for the solar systems formation

A

Gas and dust clouds condensed to form the sun / formed later within a nebular disc

30
Q

Material that has the highest condensation temperature

A

Rocks & dust grains

31
Q

Formation of terrestrial type planets around a star

A

Accretion or slow accumulation of smaller particles by mutual gravitational attraction

32
Q

Process of chemical differentiation

A

The sinking of heavy material to the center of a planet

33
Q

How many of the satellites of the Jovian planets have formed

A

From a disc of material around the planet

34
Q

What is the Oort cloud

A

A Spherical solar system halo of icy objects

35
Q

Is not a technique used to discover exoplanets

A

Ultraviolet excess

36
Q

Earth is the only planet who’s atmosphere contains a significant amount of

A

Oxygen

37
Q

The albedo of the planet is a fraction of energy that is

A

Reflected by the whole planet including atmosphere and surface

38
Q

The basic structure of earths interior

A

Solid inner core, molten iron outer core, Rocky mantle , and lighter Rocky crust

39
Q

The composition of Earth’s core

A

Pure iron

40
Q

Upper layers of the mantle or plastic

A

Because the continents are able to flow and drift

41
Q

The name Pangaea refers to

A

Supercontinent that split into the north and south America Europe and Africa

42
Q

The average speed of motion of the plates of earths surface is

A

A few centimeters per year

43
Q

On earth you would expect to find metamorphic rocks where

A

boundaries of colliding tectonic plates

44
Q

Earths magnetosphere is

A

beyond the atmosphere with a magnetic field protects us

45
Q

Van Allen belts are

A

Regions of high energy charged particles trapped

46
Q

Aurora on Northern and Southern lights are caused by

A

Charge particles from magnetosphere

47
Q

Photosynthesis is a chemical process that takes place in a greenhouse what is the effect of our atmosphere

A

It consumes carbon dioxide from our atmosphere and produces oxygen

48
Q

Which is the most abundant gas

A

Nitrogen

49
Q

The basic structure of earths atmosphere

A

Four layers of alternating temperature profiles

50
Q

The greenhouse effect is

A

Absorption by atmospheric gases of infrared radiation

51
Q

We need to ozone layer because it

A

Shield us from harmful solar ultraviolets radiation

52
Q

Earths biosphere includes

A

The troposphere, stratosphere in everything down to 1 km

53
Q

Lowest pressure in earths atmosphere occurs when

A

The boundary of upper troposphere with the stratosphere

54
Q

The diameter of the moon is

A

One fourth

55
Q

In its orbit Around the earth the moon

A

Always keep the same side towards earth

56
Q

The moon has

A

No measurable atmosphere or liquid water

57
Q

Most of the craters on the moon were formed by

A

Bombardment by interplanetary you

58
Q

Maria are

A

Large impact craters and filled by lava

59
Q

What is Scarp

A

A long wall when the moon surface cold and shrink

60
Q

What can we say about the moons magnetic field

A

Has iron rich core that is partly Molten

61
Q

The primary cause of moonquakes

A

Title forces due to gravitational pull of the earth

62
Q

The age of the moon rocks has been determined by

A

Measurements of radioactive decay products

63
Q

What will most likely be the fate of the footprints that the astronaut left on the moon

A

obliterated by micrometeorite impacts

64
Q

Most of the craters on the moon were formed by

A

Rocky debris during the first billion years of the moons history

65
Q

What effect of the ocean waters title drag on earth is

A

It slows down earths spin rate

66
Q

The speed of light and glass is

A

Less

Physics Exam 2 (1 decks)

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