The ____________________ of the sun is composed of ionized gas and produces a continuous spectrum with a superimposed emission spectrum
Fill in the blank(s) with correct word
corona
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The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and 2.5 cm, respectively. An object is placed 0.3 cm from the objective. The image of this object is viewed with the eyepiece adjusted for minimum eyestrain
What is the distance between the objective and the eyepiece? A) 9.85 cm B) 10.1 cm C) 10.4 cm D) 11.2 cm E) 11.5 cm
When the IDL is crossed going from east to west, a day is ______________
Fill in the blank(s) with correct word
A single slit, 1400 nm wide, forms a diffraction pattern when illuminated by monochromatic light of 490-nm wavelength
What is the largest angle from the central maximum at which the intensity of the light is zero? A) 44° B) 41° C) 38° D) 35° E) 32°
The largest optical telescope ever constructed was a refracting telescope
Indicate whether the statement is true or false