Some questions Jr Astronomy Olympiad?
Q) A blue torch is seen through a red filter. What color u wud see a) blue b) red c) White d) Q2 is not color) Star A is green and B star is red. If the stars collide and become a star in what will be the color resulting star (Support your answer) a, b) red) orange c) yellow d) Q3 Blue) larger telescopes astronomers prefer bcoz a) gives a brighter image b) larger image c) large field of view d) sensitive to the widest range of wavelengths
Q1) d the assumption that the torch * Perfectly is blue and the filter is perfectly * * red as the filter only allows red light, but just to pass the blue light is absorbed. Q2) Assuming b that the star is a black body.The red star has a temperature of around 4000K, and the green star approx. 5300K (found by law discplacement Weins (* wavelength the black body temperature = 2.7 * 10 ^ -3)) the temperature at about the final star on the average of the two temperatures, ie4600K. By the same law which corresponds at a wavelength of 5.8 * 10 ^-7m which is approx. orange. Q3), but remember that the brightness increases only for extended objects. This can not be b) d) bcoz that Telescopes do not provide images larger or wider range of wavelengths.Also feild of veiw need not depend on the size of the telescope.
Sirius Stargazing
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