Electromagnetic Waves

JEE Main level, single correct, medium

144 of 165

Question 144 of 165

Match List - I with List - II List-I List-II (a) UV rays (i) Diagnostic tool in medicine (b) XX-rays (ii) Water purification (c) Microwave (iii) Communication, Radar (d) Infrared wave (iv) Improving visibility in foggy days Choose the correct answer from the options given below :

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Answer: (B) (a)−(ii),(b)−(i),(c)−(iii),(d)−(iv)\left(a\right)-\left(ii\right),\left(b\right)-\left(i\right),\left(c\right)-\left(iii\right),\left(d\right)-\left(iv\right)

(a) uv rays - used for water purification
(b) xx-rays have high penetration power. Therefore, they are used for diagnosing fracture
(c) Microwaves are used for mobile and radar communication
(d) Infrared waves show less scattering therefore used in foggy days
(a−ii),(b−i),(c−iii),(d−iv)\left(a-ii\right),\left(b-i\right),\left(c-iii\right),\left(d-iv\right)

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