Question
Identify the electromagnetic waves whose wavelengths vary as
  1. $10^{–12 m} < \lambda < 10^{–8} m$
  2. $10^{–3 m} < \lambda< 10^{–1} m$
Write one use for each.

Answer

  1. $X -$ rays
Used for medical purposes.
  1. Microwaves
Used in radar systems.

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

Explain the thermonuclear fusion from the fusion of helium atom in the interior of a star and the Red Giant of the Sun.
An atom absorbs a photon of wavelength 500nm and emits another photon of wavelength 700nm. Find the net energy absorbed by the atom in the process.
Derive/obtain the equation of current in case of $AC$ voltage applied to a resistor and also draw the graph showing the phase difference between voltage and current.
Explain quantisation of charge.
An inductor-coil of inductance $17\ mH$ is constructed from r wire of length 100m and cross-sectional area a copper wire of length $100m$ and cross-sectional area $1mm^2$. Calculate the time constant of the circuit if this inductor is joined across an ideal battery. The resistivity of copper $=1.7\times10^{-8}\Omega-\text{m}.$
A light beam travelling in the $x-$ direction is described by the electric field: $E _{ y }=270 \sin \omega\left(t-\frac{x}{c}\right)$. An electron is constrained to move along the $y-$ direction with a speed of $2.0 \times 10^7 ms^{-1}$. Find the maximum electric force and maximum magnetic force on the electron.
Suppose, we think of fission of a $^{56}_{26}\text{Fe}$ nucleus into two equal fragments, $^{28}_{13}\text{Al}.$ Is the fission energetically possible? Argue by working out Q of the process. Given $\text{m}(^{56}_{26}\text{Fe})=55.93494\text{ u and m }(^{28}_{13}\text{Al})=27.98191\text{ u}.$
Balmer series was observed and analysed before the other series. Can you suggest a reason for such an order?
The distance between the two plates of a parallel plate capacitor is 4 mm . A 3 mm thick dielectric strip having dielectric constant 3 is placed between the plates parallel to the plates. The distance between the plates is arranged in such a way that the capacitance of the capacitor becomes $2 / 3$ of the initial capacitance. What is the new distance between the plates?
What is the radius of the path of an electron $($mass $9 \times 10^{-31} \ kg$ and charge $1.6 \times 10^{-19} C )$ moving at a speed of $3 \times 10^7 m / s$ in a magnetic field of $6 \times 10^{-4} T$ perpendicular to it? What is its frequency? Calculate its energy in $keV .\left(1 eV =1.6 \times 10^{-19} J \right)$.