Doubtly
@Doubtly · Joined Feb 2021
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- The distance between two consecutive bright fringes in a biprism experiment using light of wavelength 6000 Å Given : λ₁ = 6000 Å = 6 x 10⁻⁷ m, λ_(2 )= 4800 Å = 4.8 x 10⁻⁷ m, W₁ = 0.32 mm =3.2 x 10⁻⁴ m Distance between consecutive bright fringes, W =... 1
- A star is emitting light at the wavelength of 5000 Å. Determine the limit of resolution of a telescope Given : λ = 5000 Å = 5 x 10⁻⁷ m, D = 200 x 2.54 cm = 5.08 m θ = 1.22λ/D = frac(1.22)(5×10⁻⁷)5.08 = 1.2×10⁻⁷ rad 1
- Monochromatic electromagnetic radiation from a distant source passes through a slit. Given : 2W = 6mm W = 3mm = 3 x 10⁻^(3 )m, y=2.5 m, (a) λ₁ = 500 nm = 5 x 10⁻^(7 )m (b) λ₂ = 50 μm = 5 x 10⁻^(5 )m (c) λ_(3 )= 0.500 nm = 5 x... 1
- What must be the ratio of the slit width to the wavelength for a single slit to have the first diffraction Given : θ = 45°, m = 1 a sin θ = mλ for (m = 1, 2, 3... minima) Here, m = 1 (First minimum) a sin 45° = (1) λ ∴ a/λ = 1/sin 45° = 1.414 This... 1
- A parallel beam of green light of wavelength 546 nm passes through a slit of width 0.4 mm. Given : λ = 546 nm = 546 x 10⁻⁹ m, a = 0.4 mm = 4 x 10⁻⁴ m, D = 40 cm = 40 x 10⁻² m, y_md = mλD/a ∴ y₁d = 1λD/a And 2y₁d = 2λD/a =(frac2×546... 1
- The intensity of the light coming from one of the slits in Young’s experiment is twice the intensity of the light coming Given : I₁:I₂ = 2:1 If E₁₀ and E₂₀ are the amplitudes of the interfering waves, the ratio of the maximum intensity to the minimum intensity... 1
- In Fraunhoffer diffraction by a narrow slit, a screen is placed at a distance of 2 m from the lens Given: D = 2 m, y₁d = 5 mm = 5 x 10⁻³ m, a = 0.2 mm = 0.2 x 10⁻³ m = 2 x 10⁻⁴ m y_md = mλD/a ∴ λ = fracy_1daD=frac5×10⁻³×0.2×10⁻³2 ∴ λ = 5 x... 1
- In a biprism experiment, the fringes are observed in the focal plane of the eyepiece at a distance of 1.2 m Given : D = 1.2 m The distance between the central bright band and the 20th bright band is 0.4 cm. ∴ y₂₀ = 0.4 cm = 0.4 x 10⁻² m W = y₂₀/20... 1
- Unpolarized light with intensity I0 is incident on two polaroids. The axis of the first polaroid makes According to Malus’ law, when the unpolarized light with intensity I₀ is incident on the first polarizer, the polarizer polarizes this incide... 1
- In a double-slit arrangement the slits are separated by a distance equal to 100 times the wavelength Data : d = 100 λ, D = 50.0 cm a) The condition for maximum intensity in Young's experiment is, d sin θ = nλ , n = 0, 1, 2..., The angle betw... 2
- A double-slit arrangement produces interference fringes for sodium light (λ =589 nm) that are 0.20° apart. Given : θ₁ = 0.20°, n_w = 1.33 In the first approximation, D sin θ_(1 )= y₁ and D sin θ_(2 )= y₂ sin θ₂/sin θ₁ = y₂/y₁ …..(1) Now, y ∝ λD/d... 1
- The optical path of a ray of light of a given wavelength travelling a distance of 3 cm in flint Let d_fg and d_m be the distances by the ray of light in the flint glass and the medium respectively. Also, let n_fg and n_m be the refractiv... 1
- White light consists of wavelengths from 400 nm to 700 nm. What will be the wavelength range seen Let λ₁ and λ₂ be the wavelengths of light in water for 400 nm and 700 nm (wavelengths in vacuum) respectively. Let λ_v be the wavelength of... 1
- What is GNU? General Public License The GNU General Public License is called GPL in short. It has some terms and conditions to copy, modify and distribute the software licensed... 1
- Which licensing authority is responsible for WordPress? WordPress is licensed under GPLv2 (GNU General Public License) which makes it free and open-source software. Each copy of WordPress has a li... 1
- Explain the steps involved in the backup of the database. In the database, all your posts, media files, comments, and metadata stored. It also contains user's information and all your plugin setting... 1
- How to Backup WordPress root Files? There are many files in your WordPress directory. These files can be downloaded back from wordpress.org site. Some of them can be retrieved... 1
- Why is Backup important? Backup allows you to retrieve your site back if something goes wrong or if your site breaks. There could be many reasons for this like exter... 1