Quiz
AQA A-Level Physics Astrophysics Course
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Questions in this quiz (23)
1What type of lens is used for observing the night sky?
- AConverging
- BDiverging
- CConcatonating
- DDiffracting
2What happens to light when it passes from air into a lens?
- AIt slows down
- BIt speeds up
- CIt bends towards the normal
- DIt bends away from the normal
- EIt is reflected off
3A convex lens is a type of converging lens
- ATrue
- BFalse
4What are components of a ray diagram?
- APrincipal Axis
- BThe Singularity
- CThe Focal Length
- DThe Principal Focus
- EThe Headline
- FThe Lens Cap
5True or False - This ray diagram shows an object between F and 2F
- ATrue
- BFalse
6True or False - This image shows a ray diagram of an object at 2F
- ATrue
- BFalse
7What are the 3 properties of an image on a ray diagram?
- AMagnification
- BDirection
- COrientation
- DNature
- EShape
- FCurvature
8True or False - The image shows The Lens Formula
- ATrue
- BFalse
9True or False - Converging lenses must have positive focal lengths, and diverging lenses must have negative focal lengths for the formula to work.
- ATrue
- BFalse
10True or False - For the formula to work, distances to real images should be negative and those to virtual images should be positive
- ATrue
- BFalse
11True or False - this diagram shows an Astronomical Telescope in normal adjustment
- ATrue
- BFalse
12The formula for Angular Magnificatio = fe/f0
- ATrue
- BFalse
13Select features which define a reflecting telescope
- AThey use a spherical mirror
- BThey can suffer from spherical aberration
- CThey feature a principal axis
- DThey use the idea of angle of incidence = angle of refraction
- EA parabolic mirror is used
- FThey suffer from chromatic aberration
14What are the differences and similarities between reflecting telescopes and Cassegrain Telescopes?
- AThey both use elliptical mirrors
- BThey both suffer from spherical aberration
- CA reflecting telescope has only one mirror, while a cassegrain telescope has two - a primary mirror and a secondary mirror
- DBoth mirrors have holes in them
15A Cassegrain reflector uses a secondary mirror to direct light rays reflected by the primary mirror through a hole in the primary mirror towards the observer
- ATrue
- BFalse
16The Hipparcos satellite used the parallax method to measure the distance to more than 100,000 stars with a precision of 0.002 arc seconds. Calculate, in metres, the maximum distance measurable by Hipparcos.
- A2x10^21m
- B2 × 10^19 m
- C3.6x10^12m
- D4.5x10^19m
17Wien’s displacement law for black body radiation is given by λmaxT = constant.
Is λmax wavelength at which maximum emission occurs- ATrue
- BFalse
18Given the suns output power is 4.0x10^26. Find the average temperature of the sun
- A5000K
- B5500K
- C5800K
- D6000K
19A: absolute magnitude: 1.40 apparent magnitude: –1.4 diameter / 10^3 km: 2400 temperature/K: 10 000
B: absolute magnitude: 11.2 apparent magnitude: 8.4 diameter / 10^3 km: 12 temperature/K 25 000
Calculate the distance to Star B in Pc- A2.00
- B2.25
- C2.50
- D2.75
- E3.00
20Which star will be the hottest and why?
- AR - has largest wavelength
- BP - has highest intensity
- CQ - ratio of intensity to wavelength closest to 1
- DP - has lowest wavelength
- ER - Has lowest intensity
21In which two spectral classes are the presence of Hydrogen Balmer absorption lines prominent features?
- AA
- BG
- CM
- DB
- EF
- FK
- GO
22Describe how Hydrogen absorption lines are produced in the spectrum of a star:
Light from the star passes through the [blank_start]atmosphere[blank_end] of the star which contains [blank_start]hydrogen[blank_end] with electrons in [blank_start]n = 2[blank_end] state electrons in this state absorb certain energies and hence [blank_start]frequencies[blank_end] of light the light is re-emitted in all [blank_start]directions[blank_end], so that the [blank_start]intensity[blank_end] of these frequencies is [blank_start]reduced[blank_end] in any given direction, resulting in [blank_start]absorption lines[blank_end].- Aatmosphere
- Bhydrogen
- Cn = 2
- Dfrequencies
- Edirections
- Fintensity
- Greduced
- Habsorption lines
23Explain what is meant by light year and parsec.
- Alight year : distance travelled by light in one year
- Blight year : distance travelled by light in one AU
- CParsec : 10 AU
- Dparsec : distance to an object subtending 1 sec of arc to Earth’s orbit
Information
- Description
- A Quiz for testing knowledge on the whole astrophysics course
- Author
- reuben inganni
- Language
- English
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