Question
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Answer (Detailed Solution Below)
Option 4 : orange barrier goggles / नारंगी बैरियर चश्मे
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Detailed Solution
सही उत्तर orange barrier goggles / नारंगी बैरियर चश्मे है।
Key Points
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prepsnap.in • Part -AQuestion:
Physiological fluids such as saliva and urine fluoresce brightly when illuminated with blue light near 455 nm and viewed through _____ / लार और मूत्र जैसे शारीरिक द्रव 455 nm के नीले प्रकाश में तीव्रता से चमकते हैं जब उन्हें _____ से देखा जाता है।
1.
clear goggles / पारदर्शी चश्मे
2.
yellow goggles / पीले चश्मे
3.
red goggles / लाल चश्मे
4.
orange barrier goggles / नारंगी बैरियर चश्मे
Correct Answer: orange barrier goggles / नारंगी बैरियर चश्मे
Fluorescence re-emits at a longer wavelength than the excitation light. The orange barrier filter blocks the reflected 455 nm blue excitation and passes only the longer-wavelength fluorescence, so the stain stands out against a dark background.
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