soni85 Posted February 7, 2009 Share Posted February 7, 2009 In astronomy the term "red shift" denotes the extent to which light from a distant galaxy has been shifted toward the red, or long-wave, end of the light spectrum by the rapid motion of the galaxy away from the Earth. (A) to which light from a distant galaxy has been shifted (B) to which light from a distant galaxy has shifted © that light from a distant galaxy has been shifted (D) of light from a distant galaxy shifting (E) of the shift of light from a distant galaxy answer is A but i think it should be B...... why to use has been while has is also correct (according to me) Quote Link to comment Share on other sites More sharing options...
mitzi Posted February 7, 2009 Share Posted February 7, 2009 Yes, It is A. the difference between a and b is pass or active the light has been shifted BY the rapid motion? or the light has shifted? Who will be the agent of the action? Please note that sometime un-underlined portion of the sentence provides us some clues. 'the extent to which' is correct idiom. Quote Link to comment Share on other sites More sharing options...
rupu Posted February 7, 2009 Share Posted February 7, 2009 light is shifted by the rapid motion... answer A Quote Link to comment Share on other sites More sharing options...
rrakesh Posted February 7, 2009 Share Posted February 7, 2009 Mitzi, can you pls. explain why we have has been in the above sentence? Action is not continous so it really does not make sense to have has been. What do you think? Quote Link to comment Share on other sites More sharing options...
mission800 Posted February 8, 2009 Share Posted February 8, 2009 @ rrakesh: simply, read the sentence as: "the light ... has been shifted ... by the rapid motion" doesnt it make better sense than "the light ... has shifted ... by the rapid motion" Quote Link to comment Share on other sites More sharing options...
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