30 Questions
Who first put forward the wave theory of light?
Christiaan Huygens
Which physicist conducted the experiment in 1850 that confirmed the speed of light in water is less than in air?
Foucault
According to the corpuscular model of light, what happens to the speed of light when a ray of light bends towards the normal on refraction?
Increases
What law did Descartes derive in 1637 related to light?
Snell's Law
Which famous book by Isaac Newton further developed the corpuscular model of light?
'OPTICKS'
What did the wave model of light predict about the speed of light when a wave bends towards the normal on refraction?
Decreases
What is the angle known as when the angle of incidence is greater than the critical angle?
Critical angle
What happens to the refracted wave when the angle of incidence is greater than the critical angle?
It undergoes total internal reflection
What is the angle of reflection equal to, based on the law of reflection?
The angle of incidence
What does the symbol 'ic' represent in the context of wave optics?
The critical angle
What happens to a refracted wave at the critical angle?
It undergoes total internal reflection
What is the phenomenon called when a wave undergoes total internal reflection?
TIR
What did Christiaan Huygens discover about Saturn's rings?
He discovered the true geometry of Saturn's rings.
In his work, what did Christiaan Huygens explain about calcite?
Its double refraction.
Which theory of light is Christiaan Huygens known for founding?
Wave theory of light.
What did Christiaan Huygens analyze for the first time?
Circular and simple harmonic motion.
What law is described in the excerpt as relating to the angles of incidence and refraction?
Snell's Law of Refraction.
In terms of refractive indices, what can be derived from Eq.(10.6)?
$n_1 \cdot \sin i = n_2 \cdot \sin r$
What is the phenomenon discussed in Section 10.7?
Polarisation based on the transverse nature of light waves
Who predicted the existence of electromagnetic waves around 1855?
Maxwell
When were radiowaves produced in the laboratory?
Around 1890
What is the basis of ray optics?
Rectilinear propagation of light
In what region does light have a wavelength of about half a micrometre?
Optical region
What experiment from school demonstrates that light travels in a straight line?
Placing three cardboards with pinholes and a candle to ensure a straight line view
What principle is the entire field of interference based on?
Principle of Superposition
When do two sources in a medium become coherent?
When the phase difference between their displacements does not change with time
In the context of two coherent sources, what does it mean when waves from both sources reach a point in phase?
They will create constructive interference
How do waves from two coherent sources behave if the distances S1P and S2P are equal?
They arrive at point P in phase
What is the significance of the position of crests and troughs in water waves according to Figure 10.8(b)?
Shows nodal and antinodal lines
What happens when waves from coherent sources interfere destructively at a point?
They cancel each other out
Learn about the life and contributions of Christiaan Huygens, a Dutch scientist known for his work in physics, astronomy, and mathematics. Explore his achievements in the wave theory of light, double refraction, circular motion, Saturn's rings, and clock and telescope design.
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