द्विक-रेखाछिद्र प्रयोग में प्रयुक्त दो प्रकाश पुंजों में से एक प्रकाश पुंज के पथ में एक पतली पारदर्शी पट्टिका रख दी जाती है। फ्रिंज प्रतिरूप विस्थापन का व्यंजक प्राप्त करें।
द्विक-रेखाछिद्र प्रयोग में दो प्रकाश पुंजों को प्रयोग में लाया जाता है, जिन्हें पारदर्शी पट्टिका द्वारा प्रभावित किया जाता है। जब एक प्रकाश पुंज के पथ में पतली पारदर्शी पट्टिका रख दी जाती है, तो इसके परिणामस्वरूप फ्रिंज प्रतिरूप में विस्थापन होता है। इसे समझने के लिए हमें पहले कुछ मूलभूत अवधारणाओं को स्पष्ट करना होगा। जब दो प्रकाश पुंज एक ही स्थान पर मिलते हैं, तो वे आपस ___ _______ ___ ______ ____ _________ ___ _____ _______ __________.
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A plane light wave of wavelength 580 nm falls on a long narrow slit of width 0.5 mm. (i) Calculate the angles of diffraction for the first two minima. (ii) How are these angles influenced if the width of slit is changed to 0.2 mm? (iii) If a convex lens of focal length 0.15 m is now placed after the slit, calculate the separation between the second minima on either side of the central maximum.
Obtain expressions for reflection and transmission amplitude coefficients when electric vector associated with a plane monochromatic electromagnetic wave which is in the plane of incidence.
एक प्रकाशिक यंत्र की विभेदन क्षमता के लिए रैले निकष की चर्चा करें। एक सूक्ष्मदर्शी के लिए विभेदन क्षमता का व्यंजक व्युत्पन्न करें।
The sodium lamp used in a physics laboratory gives out light uniformly. Suppose that the lamp uses 40 W. Calculate the magnitude of electric field.
Two energy levels of an atomic system are separated by energy corresponding to frequency 3.0 × 10¹⁴ Hz. Assume that all atoms are in one or the other of these two energy levels, compute the fraction of atoms in the upper energy level at temperature 400 K. Take k_B = 1.38 × 10⁻²³ JK⁻¹ and h = 6.6 × 10⁻³⁴ Js.
Describe polarisation of light by reflection. How does degree of polarisation vary with angle of incidence of light?
A plano-convex lens of radius 1.0 m is placed on an optically flat glass plate and is illuminated by an extended monochromatic source. Assume that the point of contact is perfect. The diameters of the and
dark rings in the reflected light are
and
. Next, the space between the lens and the glass plate is filled with a liquid. The diameter of the
ring changes to
. Calculate the refractive index of the liquid when the ring is (i) dark, and (ii) bright, if the wavelength of light is
.