The moon's distance from the earth is `360000 km` and its diameter subtends an angle of `42'` at the eye of the observer. The diameter of the moon in kilometers is
What is the meaning of angular diameter of the Moon ?
The diameter of the sun subtends an angle of 0.5^(@) at the pole of the concave mirror. The radius of curvature of the mirror is 1.5 m. Find the diameter of the image of the sun. Consider the distance of sun from the mirror infinite
(a) A giant refracting telescope at an observatory has an objective lens of focal length 15m. If an eyepiece of focal length 1.0cm is used, what is the angular magnification of the telescope? (b) 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 3.48 xx 10^(6)m , and the radius of lunar orbit is 3.8xx10^(8)m .
The distance between the Earth and the Moon is
Both the earth and the moon are subject to the gravitational force of the sun. As observed from the sun, the orbit of the moon'
The diameter of the moon is approximately one-fourth of the diameter of the earth. What fraction of the volume of the earth is the volume of the moon ?
A point source of light is kept at a distance of 15cm from a converging lens,on its optical axis.The focal length of the lens is 10cm and its diameter is 3cm ,A screen is placed on the other side of the lens ,perpendicular to the axis of lens,at a distance 20cm from it.Then find the area of the illuminated part of the screen?
The angle subtended by the moon's diameter at a point on the earth is about 0.50^(@) . Use this and the fact that the moon is about 384000km away to find the approximate diameter of the moon .
The mass of an object on the earth is 10 kg. then its mass on the moon would be…………….kg.
