Physical Optics
In a thin film, the path difference depends on the:
A) Wavelength only
B) Thickness only
C) Angle of incidence only
D) Thickness, angle of refraction, and wavelength
An instrument that can be used to measure the wavelength of light very accurately is the:
A) Telescope
B) Microscope
C) Diffraction grating
D) Prism
The blue color of the sky is a result of:
A) Interference
B) Diffraction
C) Scattering
D) Polarization
Which phenomenon occurs when the size of the obstacle is comparable to the wavelength of light?
A) Reflection
B) Refraction
C) Diffraction
D) Polarization
For a wave, the product of its frequency and wavelength is equal to its:
A) Amplitude
B) Speed
C) Period
D) Energy
In the equation \( d \sin\theta = m\lambda \) for a grating, the symbol 'm' represents:
A) Mass
B) The order of the spectrum
C) The number of slits
D) The fringe width
A light wave is traveling in a vacuum. Which of its properties changes when it enters glass?
A) Frequency
B) Wavelength
C) Speed
D) Both B and C
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