Optics Lab Final

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Optics Lab Final Exam

Test your knowledge in the fascinating field of optics with our engaging quiz designed for students and enthusiasts alike. This quiz covers essential concepts related to optics experiments, diffraction, interference, and the speed of light.

10 challenging questions
Multiple choice format
Designed for optics and physics enthusiasts

10 Questions2 MinutesCreated by MeasuringLight42

A diffraction grating is to be used to find the wavelength of the emission spectrum of a gas. When He-Ne laser (λ=632.8 nm) is incident on this grating, it is deflected by 〖44.2〗^°in the second order. When an unknown light is incident, it is deflected by 〖35.5〗^° in the second order. What is the wavelength of the unknown light?

718.6 nm

619.9 nm

1000 nm

514 nm

In the speed of light experiment if you put the reflector at a distance 20 cm from the light source and the speed of light meter is adjusted at the knob ∆t and shows a reading =1.37 ns, calculate the experimental value of the speed of light in air.

3×〖10〗^8 m/s

29.1×〖10〗^7m/s

1.45×〖10〗^8m/s

2.9 m/s

The resultant fringes when you measure the diameter of the given red blood cell are an example of:

Diffraction by single slit

Refraction by circular aperture

Interference

Diffractionby circular apertured

A 1000mm long glass rod was used in the lab to measure the speed of light in glass. The horizontal displacement of the rod needed to make equal optical path length between glass and air is 50 cm. Find the speed of light in this glass if the speed of light in air is 2.99×〖10〗^8 m/s.

1.99×〖10〗^8 m/s

2.8×〖10〗^8 m/s

0.5×〖10〗^8 m/s

1.5×〖10〗^8 m/s

The resultant fringes in Michelson interferometer illustrate the phenomena of light:

Diffraction

Polarization

Interference

Refraction

In a diffraction experiment, bright fringes are produced when the path difference between two similar monochromatic lights is equal to

(0.5 x wavelength)

B. Integer x wavelength

(integer + 0.5) x the wavelength

3/2 x wavelength

When two lights hit a screen, the phenomenon occurs and produces bright area is called

Diffraction

Refraction

B. Reflection

Interference

In red blood cell experiment, if the wavelength of the light used is 600 nm and the screen is at a distance 20 cm from the cell and the diameter of the first dark fringe is found to be 38 mm then the cell diameter is

7.7 µm

3.85 µm

6.3 µm

3.15 µm

In Michelson interferometer experiment , if one mirror was moved 20 µm and the number of bright fringes counted was 100, then the wavelength of the light used is

632.8 nm

800 nm

400 nm

125 nm

In which experiment both interference and diffraction occur

Michelson interferometer

Diffraction grating

Both diffraction grating and red blood cell

Red blood cell

Optics Lab Final

Optics Lab Final Exam

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