Electromagnetic Waves Quiz

Which of the following is true about electromagnetic waves?

• They require a medium to propagate.

• They are longitudinal waves.

• They travel at the speed of light in a vacuum.

• They cannot travel through space.

Which part of the electromagnetic spectrum is most relevant for human vision?

• Infrared

• Visible light

• Ultraviolet

• X-rays

Snell’s Law relates to which of the following phenomena?

• Diffraction

• Polarization

• Reflection

• Refraction

The principle that "every point on a wavefront acts as a source of spherical wavelets" is known as:

• Rayleigh Criterion

• Huygen’s Principle

• Doppler Effect

• Fermat’s Principle

What property of light is manipulated by polarizers?

• Speed

• Intensity

• Direction of vibration

• Wavelength

Which type of polarized light is characterized by equal amplitudes but a phase difference of π/2?

• Plane polarized light

• Circularly polarized light

• Elliptically polarized light

• None of the above

Circular Dichroism Spectroscopy is used to analyze:

• DNA sequences

• Protein structures

• Oxygen levels in blood

• Refractive indices of tissues

What happens to light as it passes through a diffraction grating?

• It is reflected at the same angle as incidence.

• It is bent and forms multiple diffraction orders.

• It is polarized into a single plane.

• It accelerates beyond the speed of light.

Lasers operate by:

• Spontaneous emission of light

• Stimulated emission of radiation

• Reflection of unpolarized light

• Refraction through lenses

Which biological molecule is studied using optical tweezers?

• Water molecules

• DNA

• Lipids

• Glucose