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Fill in the blanks: 

(i)............are generated by oscillating currents in special vacuum tubes. 

(ii) Human eye is most sensitive to.................color light. 

(iii)...................is the important source of ultraviolet radiation. 

(iv)................are used as the diagnostic tool in medical, 

(v) Infrared radiations can be detected by a..............

1 Answer

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(i) microwaves. 

(ii) yellow–green (λ = 5 × 10–7 m) 

(iii) Sun. 

(iv) X – rays. 

(v) thermopile

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