Lasers

Full form of LASER

• Light Amplification by Spontaneous Emission of Radiation

• Light Amplification by Stimulated Emission of Radiation

• Light Attenuation by Stimulated emission of Radiation

• None of the above

Tags

NGSS.HS-PS4-5

Which is not a characteristic of LASER?

• Monochromatic

• Directionality

• Multiple Wavelength

• High Intensity

Tags

NGSS.HS-PS4-5

The attenuation of light in an optical medium can be described with the help of

• Absorption coefficient

• Coefficient of Stimulated emission

• Coefficient of Spontaneous emission

• None of the above

Tags

NGSS.HS-PS4-5

The light intensity decreases __________ with distance in the medium

• Exponentially

• parabolically

• steeply

• none of the above

As distance between nucleus and electron decreases kinetic energy ______

• decreases

• increases

• does not vary

• none of the above

An electron in ground state is

• unstable

• stable

• fluctuating

• vigorous

The passing of an electron from one energy level to another within the atom is called

• quantum transition

• quantum mechanics

• atom transfer

• resonant transfer

The number of atoms per unit volume that occupy a given energy state is called

• population

• meta stable state

• active state

• none of the above

Interaction with light photons is one of the means of supplying energy to electron to undergo transition

• True

• False

Tags

NGSS.HS-PS4-3

The atoms _______ energy to raise from a lower energy level to upper energy level

• release

• absorbs

• produce

• none of the above

Tags

NGSS.HS-PS1-1