Ozone prevents the entry of

⇦

⇨

Ozone prevents the entry of

Options

(a) infrared rays
(b) visible rays
(c) UV rays
(d) X-rays

Correct Answer:

UV rays

Explanation:

Ozone layer or shield is present in stratosphere which is also called ozonosphere. It lies at an altitude of 23-25 km over equator and its concentration is 300 dobsons. It functions as a shield against strong UV radiations. Protection from UV radiations is proportional to thickness of ozone layer. Depletion in the concentration of ozone over a restricted area as spring time decline over Antartica is called ozone hole. Thinning of ozone layer increases the amount of UV-B radiations reaching the earth. It would increase occurence of cataracts, skin cancers, herpes, dimming of eye sight, photoburning, deficient functioning of immune system.

Related Questions:

1. In mammalian eye, the ‘fovea’ is the center of the visual field, where:
2. ETS is present in
3. Besides RBC blood plasma also carries O₂ in solution. The % is
4. Which of the following is not one of the prime health risks associated with greater
5. When two species of different genealogy come to resemble each other

Topics: Conservation and Environmental Issues (111)
Subject: Biology (4253)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends