Question

Fill in the blanks:

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

(ii) Human eye is most sensitive to.................***** 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..............

Answer 1

(i) microwaves.

(ii) yellow–green (λ = 5 × 10–7 m)

(iii) Sun.

(iv) X – rays.

(v) thermopile