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20.8 Can X-rays be reflected refracted diffracted and polarized just like any other waves? Explain.

### 20.8 Can X-rays be reflected refracted diffracted and polarized just like any other waves? Explain.

18.6. How X-rays are dufferent from the visible radiations.

### 18.6. How X-rays are dufferent from the visible radiations.

When an electron in hydrogen atom jumps from higher orbit into fourth orbit. The set of linesemitted is called:A) Balmer seriesB) Lyman seriesC) Bracket seriesD) Paschen series

### When an electron in hydrogen atom jumps from higher orbit into fourth orbit. The set of linesemitted is called:A) Balmer seriesB) Lyman seriesC) Bracket seriesD) Paschen series

The penetrating power of X-rays is increased byA) Decreasing their intensityB) Increasing their intensityC) Increasing their velocityD) None of these

### The penetrating power of X-rays is increased byA) Decreasing their intensityB) Increasing their intensityC) Increasing their velocityD) None of these

In a hydrogen atom the radius of the electron orbit is governed by Bohrs quantum rule which states thaA) the linear momentum of the electron is quantisedB) the angular momentum of the electron is quantisedC) the linear velocity of the electron is quantisedD) the angular velocity of the electron is quantized

### In a hydrogen atom the radius of the electron orbit is governed by Bohrs quantum rule which states thaA) the linear momentum of the electron is quantisedB) the angular momentum of the electron is quantisedC) the linear velocity of the electron is quantisedD) the angular velocity of the electron is quantized

When an electron jumps from higher to lower orbit:A) energy is absorbedB) energy is emittedC) neither absorbed nor emittedD) none of these