Physics Exam 2 Flashcards
What is the refraction of light
Absorption of light/ dense transverse
Which type of telescope uses a lender as a main obstacle elements
Refracting telescope
Light gathering power of a telescope is related directly to the
primary Mirror or lens
A typical reflecting telescope is made up of
A long focal length front /short focal length rear
What happens when he being white light is passed through a prism of glass
Different colors / different angles to produce a spectrum
When white light passes through a prism which wavelength of light or deflected most by the glass
Shorter wavelengths
A Newtonian telescope consist of which of the following combination of optical elements
concave /one flat mirror
One major difference between radio waves and light is that
Radio waves have a shorter wavelength
How does angular resolutions for giving diameter of telescope depend on wavelength
Resolution worsens as wavelength increases
Main reason for combining many radio telescopes together into a interferometer with large distance between telescopes
sharper image /sources
Two ranges of electromagnetic
Visible and radio
What range of wavelengths does the Hubble space telescope operate
Infrared, visible & ultraviolet
High-energy telescope to take the radiation at the high energy and of the electromagnetic spectrum namely
X-rays & gamma rays
And electromagnetic wave has a wave of 80 cm
Radio Wave
How many stars are in our solar system
1
The overall shape of the orbit
Slightly elliptical but nearly circular
Best way to measure the mass of the planet is to measure
Size & rotational speed
The mean density of a planet is
mass divided by volume
Which planet does not have natural satellites
Venus & Mercury
The astroid belt exist between the orbits of which planets
Mars & Jupiter
Pluto is classified as a
Minor planet
The most common elements in the universe are
Equal hydrogen and helium / small amounts of heavier elements
Hydrogen and helium account for
98%
Which following Chemical elements is relatively rare
Gold
Our solar system seems to have formed about how long ago
5 billion years
When dealing with radioactive decay of materials we often read about the age of a particular rock
age of Atoms within the rock
Radioactive decay in Atom occurs because the
unstable nucleus by exposure to the nuclear reactions
What was the form of the material from which the solar system formed
A nebula made mostly of hydrogen and helium gas ( supernova explosions)
Most probable theory for the solar systems formation
Gas and dust clouds condensed to form the sun / formed later within a nebular disc
Material that has the highest condensation temperature
Rocks & dust grains
Formation of terrestrial type planets around a star
Accretion or slow accumulation of smaller particles by mutual gravitational attraction
Process of chemical differentiation
The sinking of heavy material to the center of a planet
How many of the satellites of the Jovian planets have formed
From a disc of material around the planet
What is the Oort cloud
A Spherical solar system halo of icy objects
Is not a technique used to discover exoplanets
Ultraviolet excess
Earth is the only planet who’s atmosphere contains a significant amount of
Oxygen
The albedo of the planet is a fraction of energy that is
Reflected by the whole planet including atmosphere and surface
The basic structure of earths interior
Solid inner core, molten iron outer core, Rocky mantle , and lighter Rocky crust
The composition of Earth’s core
Pure iron
Upper layers of the mantle or plastic
Because the continents are able to flow and drift
The name Pangaea refers to
Supercontinent that split into the north and south America Europe and Africa
The average speed of motion of the plates of earths surface is
A few centimeters per year
On earth you would expect to find metamorphic rocks where
boundaries of colliding tectonic plates
Earths magnetosphere is
beyond the atmosphere with a magnetic field protects us
Van Allen belts are
Regions of high energy charged particles trapped
Aurora on Northern and Southern lights are caused by
Charge particles from magnetosphere
Photosynthesis is a chemical process that takes place in a greenhouse what is the effect of our atmosphere
It consumes carbon dioxide from our atmosphere and produces oxygen
Which is the most abundant gas
Nitrogen
The basic structure of earths atmosphere
Four layers of alternating temperature profiles
The greenhouse effect is
Absorption by atmospheric gases of infrared radiation
We need to ozone layer because it
Shield us from harmful solar ultraviolets radiation
Earths biosphere includes
The troposphere, stratosphere in everything down to 1 km
Lowest pressure in earths atmosphere occurs when
The boundary of upper troposphere with the stratosphere
The diameter of the moon is
One fourth
In its orbit Around the earth the moon
Always keep the same side towards earth
The moon has
No measurable atmosphere or liquid water
Most of the craters on the moon were formed by
Bombardment by interplanetary you
Maria are
Large impact craters and filled by lava
What is Scarp
A long wall when the moon surface cold and shrink
What can we say about the moons magnetic field
Has iron rich core that is partly Molten
The primary cause of moonquakes
Title forces due to gravitational pull of the earth
The age of the moon rocks has been determined by
Measurements of radioactive decay products
What will most likely be the fate of the footprints that the astronaut left on the moon
obliterated by micrometeorite impacts
Most of the craters on the moon were formed by
Rocky debris during the first billion years of the moons history
What effect of the ocean waters title drag on earth is
It slows down earths spin rate
The speed of light and glass is
Less
