If the angular diameter of the moon be 30, how far from the eye a coin of diameter `2. 2c m` be kept to hide the moon?

If the angular diameter of the moon be 30 , how far from the eye a coin of diameter 2.2cm be kept to hide the moon?

The angular diameter of a moon is 30 minute. At what distance a coin of diameter 2 . 2 cm should be placed so that moon will be fully covered.

What is meant by angular diameter of moon ? What is its value?

The diameter of the moon is 3474km and is 384,400 km away from the earth. Calculate the angular diameter of the moon in arc minutes.

Find the diameter of the image of the moon formed by a spherical concave mirror of focal length 7.6 m. The diameter of the moon is 3450 km and the distance of the earth and the moon is 3.8 xx 10^5 km.

(i) A giant refracting telescope at an observatory has an objective lens of focal length 15 m . If an eyepiece of focal length 1.0 cm is used, what is angular magnification of the telescope ? (ii) If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens ? the diameter of the moon is 3.48xx10^(6)m , and the radius of lunar orbit is 3.8xx10^(8) m .

Assuming the distance of the earth from the moon to be 38,400km and the angle subtended by the moon at the eye of a person on the earth to be 31, find the diameter of the moon.