Wave Optics

Which phenomenon proves that light has wave properties?

• Images formed by lenses

• Interference patterns formed when light passes through narrow slits/diffraction grating

• Light reflecting off a mirror

• The refraction of light as it passes from air into water

Tags

NGSS.HS-PS4-3

The relative index of refraction between two media is 1.20. Compared to the velocity of light in medium 1, the velocity of light in medium 2 will be...

• greater by 1.2 times

• reduced by 1.2 times

• the same

• the velocity will depend on the two media

Tags

NGSS.HS-PS4-1

What is the velocity of light in glass (n = 1.36)?

• 2.2 x 10⁸ m/s

• 3 x 10⁸ m/s

• 4.08 x 10⁸ m/s

• 1.36 x 10⁸ m/s

Tags

NGSS.HS-PS4-1

If the intensity (depends on amplitude) of a monochromatic ray of light is increased while the ray is incident on a pair of narrow slits, the spacing between maxima in the diffraction pattern will be...

• increased

• decreased

• the same

• increased or decreased, depending on frequency

In a Young's double-slit experiment, both the wavelength and the slit separation are increased by 50%. What happens to the distance between two adjacent bright fringes?

• It increases by 50%.
• it decreases by 50%.
• The distance stays the same.
• The distance increases by 100% or more.

Tags

NGSS.HS-PS4-1

If a wave from one slit of a Young's double-slit experiment set-up arrives at a point on the screen one wavelength behind the wave from the other slit, what is observed at that point?

• dark fringe
• bright fringe
• multi-colored fringe
• gray fringe, neither bright nor dark

Tags

NGSS.HS-PS4-1

In order to produce a sustained interference pattern by light waves from multiple sources, which of the following conditions must be met?

• Sources are coherent.
• Sources are monochromatic.
• Both choices above are valid.
• None of the choices are valid.

Two beams of coherent light are shining on the same piece of white paper. With respect to the crests and troughs of such waves, darkness will occur on the paper where:

• the crests from both waves overlap
• the crest from one wave overlaps with the trough from the other
• the troughs from both waves overlap
• darkness cannot occur as the two waves are coherent

Tags

NGSS.HS-PS4-5

If the 2nd order maximum for a double-slit experiment occurs at an angle of 45.0^o, what is the relationship between the wavelength and the distance between the slits?

• d = 1.41 λ
• d = 2.00 λ
• d = 2.83 λ
• d = 4.00 λ

Tags

NGSS.HS-PS4-1

In _______________ waves, molecules vibrate perpendicular to wave motion and in __________________ waves, molecules vibrate parallel to wave motion.

• Longitudinal, Transverse

• Transverse, Longitudinal

• Water, Transverse

• Longitudinal, Electromagnetic