CA 1 Test (2023-24) Sem I

Your Name

Class Roll No. (write CE 99 or ME 99 format)

Choose your section

• Civil Engineering
• Mechanical Engineering
• Computer Engineering
• Electrical Engineering

Laser is an acronym for

• Light Amplification by Stimulated Emission of Radiation
• Light Amplitude and Stimulated Emission of Radiation
• Light Amplified by stimulate emission of Radioactivity
• Light Amplification of Stimulated Emission by Radiation

Ultrasound waves travel fastest in

• Solids
• Liquids
• gases
• vacuum

In Ruby laser, the lasing wavelength is due to

• Chromium
• Ruby Crystal
• Aluminium
• Aluminium Oxide
• All of these

In He-Ne Laser,

• Helium is about 10 times that of Neon
• Neon is about 10 times that of Helium
• Neon is about 100 times that of Helium
• Helium is about 1000 times that of Neon
• None of these

Which of the following process is essential for laser to lase

• All of these
• Spontaneous emission
• Stimulated emission
• population inversion
• absorption

The laser used in Mouse is

• Pulsed laser
• Dye Laser
• Gas Laser
• Semiconductor Laser
• All of these

The pumping process used in He-Ne laser is

• Electrical Discharge
• Optical Pumping
• Laser pumping
• Chemical Pumping