MCQ
The colour of sky is blue due to :
- Ainterference
- ✓scattering
- Cdiffraction
- Dpolarisation
✓
Answer
Correct option: B.
scattering
B
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The fundamental frequency of a vibrating organ pipe is $200\ Hz$.
→Let Q and W denote the amount of heat given to an ideal gas and the work done by it in an isothermal process.
- Q = 0
- W = 0
- Q ≠ W
- Q = W
When two converging lens of same focal length $f$ are placed in contact then the focal length of the combination is :
→Angle of a prism is $30^\circ$ and its refractive index is $\sqrt{2}$ and one of the surface is silvered. At what angle of incidence, a ray should be incident on one surface so that after reflection from the silvered surface, it retraces its path
→The natural frequency of an LC - circuit is 1,25,000 cycles per second. Then the capacitor C is replaced by another capacitor with a dielectric medium of dielectric constant k. In this case, the frequency decreases by 25kHz. The value of k is:
In Bohr model of hydrogen atom, the ratio of periods of revolution of an electron in n = 2 and n = 1 orbits is(a) 2 : 1(b) 4 : 1(c) 8 : 1(d) 16 : 1
A magnet is suspended in such a way that it oscillates in the horizontal plane. It makes $20$ oscillations per minute at a place where dip angle is $30^{\circ}$ and $15$ oscillations per minute at a place where dip angle is $60^{\circ}$. The ratio of total earth's magnetic field at the two places is
→Suppose, the acceleration due to gravity at the earth's surface is $10\ ms^{-2}$ and at the surface of Mars it is $40ms^{-2}.$ A $60\ kg$ passenger goes from the earth to the Mars in a spaceship moving with a constant velocity. Neglect all other objects in the sky. Which part of best represents the weight $($net gravitational force$)$ of the passenger as a function of time?
→An $X-$ray tube with a copper target emits $Cu K_\alpha$ line of wavelength $1.50 \mathring A .$ What should be the minimum voltage through which electrons are to be accelerated to produce this wavelength of $X$ rays $\left(h=6.63 \times 10^{-34} J-\sec, c=3 \times 10^8\ m / s\right)$
→X-rays and gamma rays are both electromagnetic waves. Which of the following statements is true(a) In general X-rays have larger wavelength than of gamma rays(b) X-rays have smaller wavelength than that of gamma rays(c) Gamma rays have smaller frequency than that of X-rays(d) Wavelength and frequency of X-rays are both larger than that of gamma rays