MCQ
What is the difference between soft and hard $X$-rays
  • A
    Velocity
  • B
    Intensity
  • Frequency
  • D
    Polarization

Answer

Correct option: C.
Frequency
Frequency of hard $\mathrm{X}$-rays is greater than that of soft $\mathrm{X}$-rays.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A spring balance is attached to the ceiling of a lift. A man hangs his bag on the spring and the spring reads $49\ N$, when the lift is stationary. If the lift moves downward with an acceleration of $5^2$, the reading of the spring balance will be
The first line of Balmer series has wavelength $6563 \mathring A$. What will be the wavelength of the first member of Lyman series
For a concave mirror, if virtual image is formed, the graph between $m$ and $u$ is of the form
The mass of a lift is $500 kg$. When it ascends with an acceleration of $2 m / s ^2$, the tension in the cable will be $\left[g=10 m / s ^2\right]$
A galvanometer of resistance $40\,\Omega $ gives a deflection of $5\, divisions$ per $mA$. There are $50\, divisions$ on the scale. The maximum current that can pass through it when a shunt resistance of $2\,\Omega $ is connected is ................ $mA$
A heavenly body is receding from earth such that the fractional change in $\lambda$ is $1,$ then its velocity is
An ideal gas is expanded adiabatically at an initial temperature of $300 K$ so that its volume is doubled. The final temperature of the hydrogen gas is $(\gamma=1.40)$
A ball of mass $2 \mathrm{~kg}$ and another of mass $4 \mathrm{~kg}$ are dropped together from a 60 feet tall building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in the ratio of
A body thrown vertically upwards with an initial velocity $u$ reaches maximum height in 6 seconds. The ratio of the distances travelled by the body in the first second and the seventh second is
The dimensional formula for Planck's constant $(h)$ is