Diffraction & Interference of Light

Diffraction & Interference of Light

H.P.3F.2 ... determine the interaction between the visible light portion of the electromagnetic spectrum and various objects... and to construct explanations of the behavior of light (reflection, refraction, transmission, interference) in these instances using models (including ray diagrams).

Multiple Choice

Which letter represents wavelength?

• A
• B
• C
• D

Multiple Choice

what type of wave is it?

• Squishy Wave

• Transverse Wave

• longitudinal wave

• longitudinal/compression/pressure waves

Multiple Choice

trough

• Part B
• Part A
• Part C
• Part D

Open Ended

What's your good thing for today? (1-10) What are your weekend plans? Would you rather be too hot or too cold?

Essential Questions

1. How does light behave when it hits an object?

2. How does light behave when it comes in contact with another light source?

Multiple Choice

What principle is responsible for light spreading as it

passes through a narrow slit?

• Refraction.

• Polarization

• Diffraction.

• Interference

Multiple Choice

What principle is responsible for alternating light and

dark bands when light passes through two or more

narrow slits?

• Refraction.

• Polarization.

• Diffraction.

• Interference.

Multiple Choice

If a wave from one slit of a Young's double slit

experiment arrives at a point, one-half wavelength

behind the wave from the other slit, what is observed at

that point?

• Bright fringe.

• Gray fringe.

• Multi-colored fringe.

• Dark fringe.

Multiple Choice

In a Young's double slit experiment, where the slit

separation is 0.15 mm and the distance to the detection

screen is 1.4 m; light of wavelength 550 nm is incident

on the two slits. How far from the midpoint of the

detection screen is the 2nd maximum (bright fringe)?

• .0080 m

• .010 m

• .014 m

• .020 m

Multiple Choice

In a Young's double slit experiment, where the slit

separation is 0.080 mm and the distance to the

detection screen is 3.0 m; the first maximum (bright

fringe) is found at 2.0 cm. What is the wavelength of the

light?

• 230 nm

• 310 nm

• 470 nm

• 530 nm

Multiple Choice

The distance between etchings on a Diffraction Grating

is 1.5 μm and the distance between the grating and the

observation screen is 0.75 m. What is the distance from

the midpoint of the screen to the 1st order maxima for

light with a wavelength of 450 nm?

• 0.23 m

• 0.42 m

• 0.49 m

• 0.63 m

Multiple Choice

The distance between etchings on a Diffraction Grating

is 1.5 μm and the distance between the grating and the

observation screen is 0.75 m. The first order maxima

resulting from a monochromatic light source is at a

distance of 0.33m from the midpoint of the screen.

What is the wavelength of the light?

• 220 nm

• 330 mm

• 660 nm

• 840 nm

Multiple Choice

In a Single Slit experiment, the width of the slit is 1.2 mm

wide, and light of wavelength 400.0 nm passes through

and strikes an observation screen 35 cm away. What is

the distance, in cm, of the second minimum (dark fringe)

from the center of the screen?

• 0.017 cm

• 0.023 cm

• 0.044 cm

• 0.071 cm

Multiple Choice

The colors on an oil slick are caused by reflection,

refraction and _______

• diffraction.

• interference.

• polarization.

Multiple Choice

Light with a wavelength of 550 nm (center of the visible

spectrum) shines on a soap bubble (n = 1.33). What is

the minimum thickness of the soap bubble to minimize

the intensity of the reflected light?

• 124 nm

• 180 nm

• 207 nm

• 264 nm

Multiple Choice

Light with a wavelength of 550 nm (center of the visible

spectrum) shines on a soap bubble (n = 1.33). What is

the minimum thickness of the soap bubble to maximize

the intensity of the reflected light?

• 103 nm

• 310 nm

• 415 nm

• 761 nm