Download App

Electromagnetic Waves — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectromagnetic Waves2 Marks
Question
Identify the electromagnetic waves whose wavelengths vary as
  1. $10^{-12 \mathrm{~m}}<\lambda<10^{-8} \mathrm{~m}$
  2. $10^{-3 \mathrm{~m}}<\lambda<10^{-1} \mathrm{~m}$
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

Explore more

More "2 Marks Questions" from Electromagnetic Waves→Electromagnetic Waves — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

Define the phenomenon of total internal reflection.
→
The internal resistance of an accumulator battery of emf 6V is $10\Omega$ when it is fully discharged. As the battery gets charged up, its internal resistance decreases to $1\Omega.$
The battery in its completely discharged state is connected to a charger that maintains a constant potential difference of 9V. Find the current through the battery (a) just after the connections are made and (b) after a long time when it is completely charged.
→
The value of the Brewster angle for a transparent medium is different for lights of different colours.
→
Can we measure the potential difference across an unbiased p–n junction by connecting a sensitive voltmeter across it?
→
Suppose you are given a chance to repeat the alpha-particle scattering experiment using a thin sheet of solid hydrogen in place of the gold foil. (Hydrogen is a solid at temperatures below 14 K). What results do you expect?
→
There is no change in the energy of a moving charged particle in a plane magnetic field. Explain, why?
→
Can two states of an ideal gas be connected by an isothermal process as well as an adiabatic process?
→
Discuss sign convention of distance for reflection by spherical mirror and refraction by spherical lens.
→
Suppose $\vec{\text{a}}$ is a vector of magnitude 4.5 unit due north. What is the vector:
  1. $3\vec{\text{a}}$
  2. $-4 \ \vec{\text{a}}?$
→
A galvanometer has a resistance of 30Ω. It gives full scale deflection with a current of 2 mA. Calculate the value of the resistance needed to convert it into an ammeter of range 0-0.3 A.
→