NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Electromagnetic Waves
NEET · Physics · Electromagnetic Waves
Read the following statements carefully: (A) Infrared waves play an...
Read the following statements carefully:
(A) Infrared waves play an important role in maintaining the earth's warmth through the greenhouse effect.
(B) X-rays are used as a diagnostic tool in medicine and as a treatment for certain forms of cancer.
(C) Microwaves are suitable for radar systems used in aircraft navigation.
(D) Ultraviolet radiations are used in LASIK eye surgery.
How many of the above statements are correct?
(A) Infrared waves play an important role in maintaining the earth's warmth through the greenhouse effect.
(B) X-rays are used as a diagnostic tool in medicine and as a treatment for certain forms of cancer.
(C) Microwaves are suitable for radar systems used in aircraft navigation.
(D) Ultraviolet radiations are used in LASIK eye surgery.
How many of the above statements are correct?
Options
- AOnly three
- BAll four
- COnly two
- DOnly one
Correct answer
B. All four
Step-by-step solution
Statement (A) is correct as infrared waves are absorbed by greenhouse gases like carbon dioxide and water vapour, keeping the earth warm.
Statement (B) is correct because X-rays are widely used in medical diagnostics and radiotherapy to destroy cancer cells.
Statement (C) is correct since the short wavelength of microwaves makes them ideal for radar systems in aircraft navigation.
Statement (D) is correct as ultraviolet radiations are focused into very narrow beams for high-precision applications like LASIK eye surgery.
Therefore, all four statements are correct.
Answer: All four
Statement (B) is correct because X-rays are widely used in medical diagnostics and radiotherapy to destroy cancer cells.
Statement (C) is correct since the short wavelength of microwaves makes them ideal for radar systems in aircraft navigation.
Statement (D) is correct as ultraviolet radiations are focused into very narrow beams for high-precision applications like LASIK eye surgery.
Therefore, all four statements are correct.
Answer: All four