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A double-slit interference pattern is produced on a screen, as shown in figure, using monochromatic light of wavelength 500 nm. Point P is the location of the central bright fringe, that is produced A double-slit interference pattern is produced on a screen as shown in figure that is produced using monochromatic light of wavelength 500 [...]

Consider interference of direct and reflected light in the situation as shown in the figure. Find the number of minima that will be formed on the screen. Consider interference of direct and reflected light in the situation as shown in the figure. Find the number of minima that will be formed on the screen. October [...]

2. Convert the following ratios to percentages: (a) 3 : 4 (b) 2 : 3 2. Convert the following ratios to percentages: (a) 3 : 4 (b) 2 : 3 October 11, 2020 Category: Chapter 7 - Cubes and Cube Roots , Maths , NCERT Class 8 ,

The figure shows the modified Fresnal biprism experiment with monochromatic source of wavelength 500 nm. The refractive angle of the glass prism is 2. Find the number of bright The figure shows the modified Fresnal biprism experiment with monochromatic source of wavelength 500 nm. The refractive angle of the glass prism is 2. Find the [...]

1. Find the ratio of the following: (a) Speed of a cycle 15 km per hour to the speed of scooter 30 km per hour. (b) 50 m to 10 km (c) 50 paise to Rs.5 1. Find the ratio of the following: (a) Speed of a cycle 15 km per hour to the speed [...]

The distance between the slit and bi-prism and between the prism and the screen are 50 cm each. The angle of prism is 179 and its refractive index is 1.5. If the distance between successive fringe The distance between the slit and bi-prism and between the prism and the screen are 50 cm each. The [...]

3. You are told that 1,331 is a perfect cube. Can you guess without factorisation what is its cube root? Similarly, guess the cube roots of 4913, 12167, 32768. 12167 3. You are told that 1 32768. 331 is a perfect cube. Can you guess without factorisation what is its cube root? Similarly guess the [...]

1. Find the cube root of each of the following numbers by prime factorisation method. (x) 91125 1. Find the cube root of each of the following numbers by prime factorisation method. (x) 91125 October 11, 2020 Category: Chapter 7 - Cubes and Cube Roots , Maths , NCERT Class 8 ,

Two plane mirrors, a source S of light, emitting monochromatic rays of wavelength lemda and a screen are arranged as shown in figure. If angle theta is very small, calculate fringe width of the interference a source S of light calculate fringe width of the interference emitting monochromatic rays of wavelength lemda and a screen [...]

1. Find the cube root of each of the following numbers by prime factorisation method. (viii) 46656 1. Find the cube root of each of the following numbers by prime factorisation method. (viii) 46656 October 11, 2020 Category: Chapter 7 - Cubes and Cube Roots , Maths , NCERT Class 8 ,