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Large aperture objects are used in telescopes because they :
A) Have better dispersion
B) Have less aberration
C) Have better resolution
D) Can see larger objects
Light with wavelength of 6000 A0 units has a frequency :
A) 5 x 10¹⁷ Hz
B) 5 x 10¹⁶ Hz
C) 5 x 10¹⁵ Hz
D) 5 x 10¹⁴ Hz
In an astronomical telescope the focal length of objective lens is 100 cm and that of eyepiece is 2 cm. The magnifying power of the telescope for the normal eye is :
A) 1/50
B) 100
C) 10
D) 50
How did the camcorder change the world of television filming?
Which was the important trade centre of ancient India on the trade route connecting Kalyana with Vengi?
Who is known as Father of Green Revolution?