6986900
Descripción
Test por Tom Frampton, actualizado hace más de 1 año
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Creado por Tom Frampton
hace más de 7 años
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Pregunta 1
Pregunta
What type of lens is used for observing the night sky?
Respuesta
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Converging
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Diverging
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Concatonating
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Diffracting
Pregunta 2
Pregunta
What happens to light when it passes from air into a lens?
Respuesta
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It slows down
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It speeds up
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It bends towards the normal
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It bends away from the normal
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It is reflected off
Pregunta 3
Pregunta
A convex lens is a type of converging lens
Respuesta
- True
- False
Pregunta 4
Pregunta
What are components of a ray diagram?
Respuesta
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Principal Axis
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The Singularity
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The Focal Length
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The Principal Focus
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The Headline
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The Lens Cap
Pregunta 5
Pregunta
True or False - This ray diagram shows an object between F and 2F
Respuesta
- True
- False
Pregunta 6
Pregunta
True or False - This image shows a ray diagram of an object at 2F
Respuesta
- True
- False
Pregunta 7
Pregunta
What are the 3 properties of an image on a ray diagram?
Respuesta
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Magnification
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Direction
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Orientation
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Nature
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Shape
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Curvature
Pregunta 8
Pregunta
True or False - The image shows The Lens Formula
Respuesta
- True
- False
Pregunta 9
Pregunta
True or False - Converging lenses must have positive focal lengths, and diverging lenses must have negative focal lengths for the formula to work.
Respuesta
- True
- False
Pregunta 10
Pregunta
True or False - For the formula to work, distances to real images should be negative and those to virtual images should be positive
Respuesta
- True
- False
Pregunta 11
Pregunta
True or False - this diagram shows an Astronomical Telescope in normal adjustment
Respuesta
- True
- False
Pregunta 12
Pregunta
The units for the Small Angle Approximation are:
Respuesta
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angle = radians height = centimetres distance = meters
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angle = radians height = metres distance = parsecs
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angle = radians height = metres distance = metres
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angle = degrees height = metres distance = metres
Pregunta 13
Pregunta
The formula for Angular Magnificatio = fe/f0
Respuesta
- True
- False
Pregunta 14
Pregunta
Select features which define a reflecting telescope
Respuesta
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They use a spherical mirror
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They can suffer from spherical aberration
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They feature a principal axis
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They use the idea of angle of incidence = angle of refraction
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A parabolic mirror is used
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They suffer from chromatic aberration
Pregunta 15
Pregunta
What are the differences and similarities between reflecting telescopes and Cassegrain Telescopes?
Respuesta
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They both use elliptical mirrors
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They both suffer from spherical aberration
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A reflecting telescope has only one mirror, while a cassegrain telescope has two - a primary mirror and a secondary mirror
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Both mirrors have holes in them
Pregunta 16
Pregunta
A 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
Respuesta
- True
- False
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