Download App

X-rays — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsX-rays1 Mark
MCQ
Visible light passing through a circular hole forms a diffraction disc of radius 0.1mm on a screen. If an X-ray is passed through the same setup, the radius of the diffraction disc will be:
  • A
    zero
  • ✓
    < 0.1mm
  • C
    0.1mm
  • D
    > 0.1m
✓

Answer

Correct option: B.
< 0.1mm
Radius of the diffraction disc is directly proportional to the wavelength of the light used for the given hole. We know that the wavelength of an X-ray is less than the wavelength of visible light. If an X-ray is passed through the same setup, the radius of the diffraction disc will be less than 0.1m.

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

Explore more

Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

The amplitude of upper and lower side bands of $A.M.$ wave where a carrier signal with frequency $11.21\, {MHz}$, peak voltage $15\, {V}$ is amplitude modulated by a $7.7\, {kHz}$ sine wave of $5 \,{V}$ amplitude are $\frac{a}{10}\, V$ and $\frac{b}{10}\, V$ respectively. Then the value of $\frac{a}{b}$ is $....$
→
An infinitely long cylinder is kept parallel to an uniform magnetic field $B$ directed along positive $z$ axis. The direction of induced current as seen from the $z$ axis will be
→
In the given nuclear reaction, how many a and b particles are emitted $92^{ X ^{235}} \rightarrow 82^{ Y ^{207}}$ 
→
If an observer is walking away from the plane mirror with 6m/sec. Then the velocity of the image with respect to observer will be
→
Two straight parallel wires, both carrying 10 ampere in the same direction attract each other with a force of $1\times 10^{-3}$N. If both currents are doubled, the force of attraction will be
→
The electric potential at the surface of an atomic nucleus $(Z = 50)$ of radius $9.0×{10^{ - 13}}\, cm$ is
→
In which of the following series, does the $121.5\,n m$ line of the spectrum of the hydrogen atom lie?
→
A proton and a deutron both having the same kinetic energy, enter perpendicularly into a uniform magnetic field B. For motion of proton and deutron on circular path of radius $R_p$ and $R_d$ respectively, the correct statement is
→
Let the refractive index of a denser medium with respect to a rarer medium be $n_{12}$ and its critical angle be $\theta_C$.  At an angle of incidence $A$ when light is travelling from denser medium to rarer medium, a part of the light is reflected and the rest is refracted and the angle between reflected and refracted rays is $90^o$.  Angle $A$ is given by
→
1 mg gold undergoes decay with 2.7 days half-life period, amount left after 8.1 days is
→