A small rod ABC is put in water making an angle 6° with vertical. If it is viewed (paraxially) from above, it
4
nw
will look like bent shaped ABC'. The angle of bending (ZCBC') will be in degree.
3
А
C
1) 20
2) 3°
3) 40
4) 4.50
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expalin future tense with examples
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