Question

a) Mention two significances of Meridians of longitude. (2)

b) Why slanting rays produce less heat? (2)

c) What is the angle of inclination of Earth’s axis with the Orbital plane and

the vertical plane? (2)

d) What is the total number of lines of latitude and meridians of longitude

drawn on Earth? (2)

e) Write two differences between IST and GMT.​

Answer 1

Answer:

The most important line of longitude is the Prime Meridian (0 degrees) which passes through Greenwich, England. All other lines of longitude are located east or west of this line. Longitude and Time: The Prime Meridian separates east and west in the same way the equator separates north and south.Vertical rays travel through a shorter distance in the atmosphere and the loss of heat is less. Slanting rays travel a longer distance through the atmosphere where much of its heat is absorbed by clouds, water vapour and dust particles.The earth's axis of rotation is tilted 66.5 degrees with respect to its orbital plane around the sun and its axis of rotation is inclined 23.5 degrees from the perpendicular, with respect to this plane. The tilt of the earth affects the angle between the sun beam and the normal over a surface.There are 360 longitudes. Prime meridian, 179 east, the longitude of 180 degrees and 179 west. The western longitude is 180W and the eastern longitude is 180E both are identical longitudes.Difference Between GMT and IST. Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London which is measured at midnight. ... India has only one time zone. *IST is ahead of GMT by 5:30 Hours.