M

Mr. Dubey • 52.30K Points
Coach 

Q. What is the wavelength of light produced by He-Ne laser in laser inspection?

(A) 6988 Å
(B) 5328 Å
(C) 5928 Å
(D) 6328 Å
Correct : Option (D)

Explanation: 
 he-ne lasers are used in laser inspection. light produced by he-ne lasers is at a wavelength of 6328 Å or 0.6 μm and that is in phase and coherent. this source is a 1000 times more intense than other monochromatic sources.

Share

Discusssion

Login to discuss.

Be the first to start discuss.

Related MCQs

Q. The power developed in four stroke I.C. engine, for the same engine speed and cylinder volume, as compared to that of a two stroke engine is

Q. IC engine cylinders are lubricated by

Q. Pascal is the unit of

Q. The moment of inertia of a hollow circular section whose external diameter is 8 cm and interial diameter is 6 cm about the axis passing through its ce

Q. For storeyed building plinth area estimate is not prepared for each storey separately.

Q. Demographic factors do not include

Q. Spatial occupancy enumeration is rarely used in CAD applications because it

Q. Cracks of a vertical nature and dark coloured fissures in a sample of hardened steel indicate that

Q. An exposed radiographic film which transmits 1% of the light incident on it has what density:

Q. In case of a beam subjected to pure bending