MCQ
The true statement is
  • A
    The order of colours in the primary and the secondary rainbows is the same
  • B
    The intensity of colours in the primary and the secondary rainbows is the same
  • C
    The intensity of light in the primary rainbow is greater and the order of colours is the same than the secondary rainbow
  • The intensity of light for different colours in primary rainbow is greater and the order of colours is reverse than the secondary rainbow

Answer

Correct option: D.
The intensity of light for different colours in primary rainbow is greater and the order of colours is reverse than the secondary rainbow
d
Primary rainbow is formed because of one total internal reflection and two refraction of white light by water droplet. A secondary rainbow appears outside of a primary rainbow and develops when light entering a raindrop undergoes two internal reflections.

Answer: The true statement is the intensity of light for different colour in primary rainbow is greater and the order of colour is reverse than the secondary rainbow.

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 moving coil galvanometer, having a resistance $G$, produces full scale deflection when a current $I_g$ flows through it. This galvanometer can be converted into $(i)$ an ammeter of range $0$ to $I_0 (I_0 > I_g)$ by connecting a shunt resistance $R_A$ to it and $(ii)$ into a voltmeter of range $0$ to $V(V = GI_0)$ by connecting a series resistance $R_V$ to it. Then,
In the circuit shown the cells $A$ and $B$ have negligible resistance. For $V _{ A }=12\; V , R _{1}=500\; \Omega$ and $R =100\; \Omega$ the galvanometer $(G)$ shows no deflection. The value of $V_{B}$ is .... $V$
Two wires of the same dimensions but resistivities ${\rho _1}$ and ${\rho _2}$ are connected in series. The equivalent resistivity of the combination is
A free hydrogen atom after absorbing a photon of wavelength $\lambda_{ a }$ gets excited from the state $n =1$ to the state $n =4$. Immediately after that the electron jumps to $n=m$ state by emitting a photon of wavelength $\lambda_{\text {. }}$. Let the change in momentum of atom due to the absorption and the emission are $\Delta p_2$, and $\Delta p_\theta$, respectively. If $\lambda_2 / \lambda_0=\frac{1}{5}$. Which of the option(s) is/are correct ?

[Use $hc =1242 eV nm ; 1 nm =10^{-9} m , h$ and $c$ are Planck's constant and speed of light, respectively]

$(1)$ $\lambda_0=418 nm$

$(2)$ The ratio of kinetic energy of the electron in the state $n = m$ to the state $n =1$ is $\frac{1}{4}$

$(3)$ $m =2$

$(4)$ $\Delta p_{ a } / \Delta p _{ o }=\frac{1}{2}$

A copper pipe of length $10 \,m$ carries steam at temperature $110^{\circ} C$. The outer surface of the pipe is maintained at a temperature $10^{\circ} C$. The inner and outer radii of the pipe are $2 \,cm$ and $4 \,cm$, respectively. The thermal conductivity of copper is $0.38 kW / m /{ }^{\circ} C$. In the steady state, the rate at which heat flows radially outward through the pipe is closest to ............. $\,kW$
A vessel of area of cross-section A has liquid to a height $H$ . There is a hole at the bottom of vessel having area of cross-section a. The time taken to decrease the level from ${H_1}$ to ${H_2}$ will be
A radioactive sample decays by two modes by $\alpha $ decay and by $\beta -decay$. $66.6 \%$ of times it decays by $\alpha -decay$ and $33.3 \%$ of times, it decays by $\beta -decay$. If half life of sample is $60$ years then what will be half life of sample, if it decays only by $\alpha - decay$. ............ $years$
Four resistances of $15\; \Omega, 12\; \Omega, 4 \;\Omega$ and $10\; \Omega$ respectively in cyclic order to form Wheats tone's network. The resistance that is to be connected in parallel with the resistance of $10\; \Omega$ to balance the network is .................. $\Omega$
A monoatomic gas at a pressure $p$, having i volume V expands isothermally to a volume $2 1$ and then adiabatically to a volume 16 V . The fina pressure of the gas is (take $\gamma=\frac{5}{3}$ )
A square coil ${10^{ - 2}}{\,m^2}$ area is placed perpendicular to a uniform magnetic field of intensity ${10^3}\,Wb/{m^2}$. The magnetic flux through the coil is........$weber$