KCET · Physics · Communication System
The phenomenon involved in the reflection of radio-waves by ionosphere is similar to
- A dispersion of light by water molecules during the formation of a rainbow
- B reflection of light by plane mirror
- C scattering of light by air particles
- D total internal reflection of light in air during a mirage
Answer & Solution
Correct Answer
(D) total internal reflection of light in air during a mirage
Step-by-step Solution
Detailed explanation
(D)
Concept based.
Concept based.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A block of certain mass is placed on a rough floor. The coefficients of static and kinetic friction between the block and the floor are 0.4 and 0.25 respectively. A constant horizontal force \(\mathrm{F}=20 \mathrm{~N}\) acts on it so that the velocity of the block varies with time according to the following graph. The mass of the block is nearly (Take \(\mathrm{g}=10 \mathrm{~ms}^{-2}\) )
KCET 2025 Medium - A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to \(\frac{3}{4}\) of the angle of the prism. The angle of deviation isKCET 2022 Medium
- The equation of a wave is given by \(y=10 \sin \left(\frac{2 \pi}{45} t+\alpha\right)\). If the displacement is \(5 \mathrm{~cm}\) at \(t=0\), then the total phase at \(t=7.5 \mathrm{~s}\) isKCET 2011 Easy
- Seven identical discs are arranged in a planar pattern, so as to touch each other as shown in the figure. Each disc has mass \(m\) radius \(R\). What is the moment of inertia of system of six discs about an axis passing through the centre of central disc and normal to plane of all discs?
KCET 2023 Easy - A prism of a certain angle deviates the red and blue rays by \(8^{\circ}\) and \(12^{\circ}\) respectively. Another prism of the same angle deviates the red and blue rays by \(10^{\circ}\) and \(14^{\circ}\) respectively. The prisms are small angled and made of different materials. The dispersive powers of the materials of the prisms are in the ratioKCET 2007 Hard
- The energy stored in an inductor of self inductance \(L\) henry carrying a current of \(I\) ampere isKCET 2011 Easy
More PYQs from KCET
- The rate constant \(k_1\) and \(k_2\) for two different reactions are \(10^{16} \times e^{-2000 / T}\) and \(10^{15} \times e^{-1000 / T}\) respectively. The temperature at which \(k_1=k_2\) isKCET 2023 Medium
- If direction cosines of a vector of magnitude 3 are \(\frac{2}{3},-\frac{1}{3}, \frac{2}{3}\) and \(a>0\), then vector isKCET 2015 Easy
- The half life of a radioactive substance is \( 20 \) minutes. The time taken between \( 50 \% \) decay and
\( 87.5 \% \) decay of the substance will beKCET 2015 Hard - What is the wavelength of light for the least energetic photon emitted in the Lyman series of
the hydrogen spectrum, (take hc \( =1240 \mathrm{eV} \mathrm{mm} \) )KCET 2015 Easy - Which one of the following is not a characteristic feature of bryophytes?KCET 2005 Hard
- How many \(6 \mu \mathrm{F}, 200 \mathrm{~V}\) condensers are needed to make a condenser of \(18 \mu \mathrm{F}, 600 \mathrm{~V}\) ?KCET 2008 Medium