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 Expert Question:
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 2 Nov 2007 01:29:58 IST
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explain the meaning of nearly normal incident rays
pleeeeeeeeeeeeeeeease use a diagram
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3 Nov 2007 13:49:16 IST
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forum experts
jee has already approached
please do not leave our doubts 4 many days
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3 Nov 2007 14:00:50 IST
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nearly normal rays simply mean that angle of incidence is so small
that sin(i)=i
the laws of refraction are actually for small angles only
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The heights which great men reached and kept, Were not attained by sudden flight, They, whilst their companions slept, Were toiling upwards in the night.... |
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3 Nov 2007 14:01:19 IST
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read the ncert its given there clearly
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The heights which great men reached and kept, Were not attained by sudden flight, They, whilst their companions slept, Were toiling upwards in the night.... |
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3 Nov 2007 14:14:30 IST
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nearly normal incident rays' mention implies that in the question if at a point in the solution u get sin(i) u can replace it with i because sin for very small angles is equal to the value of the angle itself ( this is for tan too. but not cos)
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- Gaurav Ragtah (spideyunlimited)
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8 Nov 2007 18:13:37 IST
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normal incident rays mean when incoming rays hit at alost 0 angle with normal..this is said in ques because if u read the lenses carefully then in order to use the formula the assumption is tht the rays are very close and hit normally
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a 2nd year IIT DELHI student, doing B.Tech in chemical engineering |
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