MCQ
According to Huygens, the ether medium pervading entire universe is:
- ALess elastic and more dense
- ✓Highly elastic and less dense
- CNot elastic
- DMuch heavier
✓
Answer
Correct option: B.
Highly elastic and less dense
Huygen considered, light needs a medium to propagate called ether which is highly elastic and less denser.
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 two rails of a railways track, insulated from each other and the ground, are connected to a milli voltmeter. What is the reading of the milli voltmeter when a train travels at a speed of $20 ms^{-1}$ along the track, given that the vertical component of the earth's magnetic field is $0.2 \times 10^{-4} Wbm ^{-2}$ and the rails are separated by $1 m$ ?
→A galvanometer has a $50$ $division$ scale. Battery has no internal resistance. It is found that there is deflection of $40$ $divisions$ when $R = 2400\,\Omega $. Deflection becomes $20$ $divisions$ when resistance taken from resistance box is $4900\,\Omega $ . Then we can conclude
→$A$ $20\,volts$ $ac$ is applied to a circuit consisting of a resistance and a coil with negligible resistance. If the voltage across the resistance is $12\, V$, the voltage across the coil is.....$volts$
→If $10000\, V$ is applied across an $X$ - ray tube, what will be the ratio of de-Broglie wavelength of the incident electrons to the shortest wavelength of $X$ - ray produced ($\frac{e}{m}$ for electron is $1.8 \times {10^{11}}\,c\,k{g^{ - 1}}$)
→The parallel rays of white light are made an incident normally on an air film of uniform thickness. $250$ fringes are seen in the transmitted light between $4000 \mathring{\text{A}}$ and $6500 \mathring{\text{A}}$. Thickness of air film is:
→What is the voltage gain in a common emitter amplifier, where input resistance is $3\, \Omega$ and load resistance $24\, \Omega, \beta=0.6 \,?$
→Figure shows the magnetic field lines in a magnetic field. $A, B.$ and $C$ are three points in this field. At what point is the magnetic field strong ?
→A normally incident ray reflected at an angle of ${90^o}$. The value of critical angle is.......$^o$
→In the diagram, a ray is passing through a broken prism, find angular deviation for the ray
The slopes of anode and mutual characteristics of a triode are $0.02 \ mA\ V^{-1}$ and 1 mA $V^{-1}$ respectively. What is the amplification factor of the valve
→