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The moon has an angle of 0.5 degrees in the terrestrial telescope lens, where the illuminance...

The moon has an angle of 0.5 degrees in the terrestrial telescope lens, where the illuminance is 0,25x10E5 lux to the normal incidence.

The focal lengths of the telescope lens and the ocular lens are 20 cm and 5cm, respectively.

Calculate the diameter of the moon in the "nearest point" of the 25 cm and the illuminance of the image of the moon.

Science   Advanced-Physics   
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