Related Questions

If α is the observed altitude, the refraction correction in seconds, is
A 58" cot α
B 58" tan α
C 58 sin α
D 58 cos α
নিচের কোনটি প্রতিসারক (Refraction) দূরবীক্ষণ যন্ত্র?
A গ্যালিলিওর দূরবীক্ষণ যন্ত্র
B গ্রেগরির দূরবীক্ষণ যন্ত্র
C নিউটনের দূরবীক্ষণ যন্ত্র
Following are errors of refraction
A Hyperopia
B Myopia
C Astigmatism
D Presbyopia
E Nyetalopia
In case of reflection and refraction of electromagnetic radiation,
A Angle of incidence = angle of refraction
B Angle of incidence = angle of reflection
C Angle of refraction = sum of the angles of incidence and refraction
D All the above
Which of the following is not caused by atmospheric refraction of light ?
A Sun appearing red at sunset
B Twinkling of stars at night
C Sun appearing higher in the sky than it actually is
D Sun becoming visible two or three minutes before actual sunrise
Change of angle of refraction with composition comprises the working principle of a
A Polarimeter
B Polarograph
C Spectrometer
D Refractrometer
Sun's halo is produced by the refraction of light in
A Water vapour in Stratus Clouds
B Ice crystals in Cirro-cumulus clouds
C Dust particles in stratus clouds
D Ice crystals in Cirrus clouds
Last Monday it has been raining in torrents. (Sentence Correction "word missing)
A till
B when
C from
D since
Have you ever been the longest sea beach of the world. (Sentence Correction "word missing)
A to
B in
C on
D up
We saw several haunted house were fire while coming from border areas. (Sentence Correction "word missing)
A in
B on
C with
D under

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