Telescopes (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is chromatic aberration in a refracting telescope?
What is chromatic aberration in a refracting telescope?
Different colours focus at different distances
What causes chromatic aberration?
What causes chromatic aberration?
Refractive index varies with wavelength
Which light is refracted more strongly in chromatic aberration?
Which light is refracted more strongly in chromatic aberration?
Blue and violet light
What visual effect does chromatic aberration produce?
What visual effect does chromatic aberration produce?
Coloured fringes around objects
Which glass has low dispersion in an achromatic doublet?
Which glass has low dispersion in an achromatic doublet?
Crown glass
How does an achromatic doublet correct chromatic aberration?
How does an achromatic doublet correct chromatic aberration?
One lens cancels the aberration of the other
What causes spherical aberration?
What causes spherical aberration?
Curved shape of the lens
How do edge rays differ from central rays in spherical aberration?
How do edge rays differ from central rays in spherical aberration?
Edge rays are deviated more strongly
What is the main visual effect of spherical aberration?
What is the main visual effect of spherical aberration?
Image blurring
How does spherical aberration differ from chromatic aberration?
How does spherical aberration differ from chromatic aberration?
It affects all wavelengths equally