Optics Lab Final
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
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
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