MCQ
The wave theory in its original form was first postulated by:
- AIssac Newton
- BThomas Young
- CChristian Huygens
- DAugustine Jean Fresnel
✓
Answer
- Christian Huygens
Explanation:
Christian Huygens postulated wave theory.
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
Two parallel, long wires carry currents i1 and i2 with i1 > i2. When the currents are in the same direction, the magnetic field at a point midway between the wires is $10 \mu\text{T}.$ If the direction of i2 is reversed, the field becomes $30 \mu\text{T}.$ The ratio $\frac{\text{i}_1}{\text{i}_2}$ is:
→If the work function for a certain metal is 3.2 
joule and it is illuminated with light of frequency 8 
Hz. The maximum kinetic energy of the photo-electrons would be (h = 6.63 
|
(a) 3.2 |
(b) 8.5 |
(c) 5.3 |
(d) 3.2 |
A light ray is incident by grazing one of the face of a prism and after refraction ray does not emerge out, what should be the angle of prism while critical angle is C
|
(a) Equal to 2C |
(b) Less than 2C |
(c) More than 2C |
(d) None of the above |
Identify the similarity between isotopes of the same element.
Assertion : Sun is at the galactic centre C of the milky way
Reason : All planets of solar system revolve around the sun.
|
(a) If both assertion and reason are true and the reason is the correct explanation of the assertion. |
|
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion. |
|
(c) If assertion is true but reason is false. |
|
(d) If assertion is false but reason is true. |
Two similar spheres having +q and -q charge are kept at a certain distance. F force acts between the two. If in the middle of two spheres, another similar sphere having +q charge is kept, then it experience a force in magnitude and direction as
|
(a) Zero having no direction |
(b) 8F towards +q charge |
|
(c) 8F towards -q charge |
(d) 4F towards +q charge |
In ...X... water is circulated though the reactor vessel and transfers energy to steam generator in the ...Y... Here, X and Y refer to:
A non-conducting solid sphere of radius R is uniformly charged. The magnitude of the electric field due to the sphere at a distance r from its centre
|
(a) Increases as r increases for r < R |
(b) Decreases as r increases for 0 < r < ∞ |
|
(c) Decreases as r increases for R < r < ∞ |
(d) a, c |
A short sighted person can see distinctly only those objects which lie between 10 cm and 100 cm from him. The power of the spectacle lens required to see a distant object is
|
(a) + 0.5 D |
(b) – 1.0 D |
(c) – 10 D |
(d) + 4.0 D |
What will be the nature of charge on the metal paper clip of electroscope when a negatively charged body is brought in contact with it?