MCQ
The continuous $X-$ rays spectrum produced by an $X-$ ray machine at constant voltage has
- AA maximum wavelength
- ✓A minimum wavelength
- CA single wavelength
- DA minimum frequency
✓
Answer
Correct option: B.
A minimum wavelength
b
(b)Continuous spectrum of $X-$ rays consists of radiations of all possible wavelength range having a definite short wavelength limit.
(b)Continuous spectrum of $X-$ rays consists of radiations of all possible wavelength range having a definite short wavelength limit.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The electron in hydrogen atom in a sample is in $n^{th}$ excited state, then the number of different spectrum lines obtained in its emission spectrum will be :
→Two masses $m_1$ and $m_2$ are supended together by a massless spring of constant $k$. When the masses are in equilibrium, $m_1$ is removed without disturbing the system; the amplitude of vibration is
→A sphere is suspended by a thread of length $l$. What minimum horizontal velocity has to be imparted the ball for it to reach the height of the suspension
→Assertion : Newton’s rings are formed in the reflected system when the space between the lens and the glass plate is filled with a liquid of refracitve index greater than that of glass, the central spot of the pattern is bright.
Reason : This is because the reflection in these cases will be from a denser to rarer medium and the two interfering rays are reflected under similar conditions.
For continuous $X-$ rays produced wavelength is
→A polyatomic gas with six degrees of freedom does $25\,\,J$ of work when it is expanded at constant pressure. The heat given to the gas is ..... $J$
→In damped oscillations, damping force is directly proportional to speed of oscillator. If amplitude becomes half of its maximum value in $1 \,s$, then after $2 \,s$ amplitude will be $\left(A_0-\right.$ initial amplitude)
→Which of the following expressions represent simple harmonic motion
The slit of a collimator is illuminated by a source as shown in the adjoining figures. The distance between the slit $S$ and the collimating lens $L$ is equal to the focal length of the lens. The correct direction of the emergent beam will be as shown in figure
→A body of mass $2\,kg$ is moving with velocity $10 \,m/s$ towards east. Another body of same mass and same velocity moving towards north collides with former and coalsces and moves towards north-east. Its velocity is
→