Observational Instruments & Methods Quiz

3x10^8 m/s

Light travels on a straight line path.

𝒄 / 𝒏 = 𝒗

<p>ASUB3229</p> Signup and view all the answers

<p>ASUB4195</p> Signup and view all the answers

<p>Speed of light is finite.</p> Signup and view all the answers

<p>The path taken by a beam between two given points is the path that can be traversed in the least time.</p> Signup and view all the answers

<p>The quantity $\Delta$ must be minimized.</p> Signup and view all the answers

<p>$d\Delta/dx = 0$</p> Signup and view all the answers

<p>The text does not explicitly state what the 'two rules' are.</p> Signup and view all the answers

<p>The main topic is optics and Fermat's Principle.</p> Signup and view all the answers

<p>The text does not explicitly define what $\Delta$ represents.</p> Signup and view all the answers

<p>The refractive index (n) of a medium is the ratio of the speed of light in vacuum (c) to the speed of light in that medium (v): n = c/v</p> Signup and view all the answers

<p>The Abbe number is an approximate measure of a material's dispersion, which is the change of its refractive index with wavelength. A high Abbe number indicates low dispersion.</p> Signup and view all the answers

<p>The optical path length ($\Delta$) is the product of the refractive index (n) and the physical path length (d) traveled by light in a medium: $\Delta = nd$. It is an additive quantity for multiple media.</p> Signup and view all the answers

<p>Fermat's principle states that light travels between two points along the path that minimizes the time taken. Snell's law of refraction is a consequence of this principle, describing the relationship between the angles of incidence and refraction at an interface between two media with different refractive indices.</p> Signup and view all the answers

<p>When a light beam encounters an interface between two different media, part of the beam is reflected at the same angle as the incident angle (following Snell's law of reflection), and part of the beam is refracted into the second medium at an angle determined by Snell's law of refraction.</p> Signup and view all the answers

<p>nC, nD, and nF represent the refractive indices of a material at specific wavelengths corresponding to the Fraunhofer C, D1, and F spectral lines, respectively (656.3 nm, 589.3 nm, and 486.1 nm).</p> Signup and view all the answers

<p>1 arcseconds = 1/60 arcminutes = 1/3600 degree</p> Signup and view all the answers

<p>206265 arcseconds</p> Signup and view all the answers

<p>To provide free contribution to the education of students at Istanbul University Faculty of Science</p> Signup and view all the answers

<p>It cannot be used as a scientific source, commercial product, recorded without permission, or duplicated for profit.</p> Signup and view all the answers

<p>1 radian = 180/π degrees</p> Signup and view all the answers

<p>The net power of a thin lens is simply the reciprocal of its focal length.</p> Signup and view all the answers

<p>n1 = n'2 = 1, n'1 = n2 = n (the refractive index of the plate)</p> Signup and view all the answers

<p>s1' = ns1</p> Signup and view all the answers

<p>The displacement Δ is independent of the object distance.</p> Signup and view all the answers

<p>$\Delta = \frac{d}{n} = \frac{d}{1.6}$</p> Signup and view all the answers

<p>The displacement Δ is independent of height y, in the paraxial approximation.</p> Signup and view all the answers