HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions

A double-slit arrangement produces interference fringes for sodium light (λ = 589 nm) that are 0.20° apart. What is the angular fringe separation if the entire arrangement is immersed in water (n = 1.33)?

State any four applications of beats.

Light of wavelength 5000 A.U. falls on a plane reflecting surface. The frequency of reflected light is ______ 

Light follows wave nature because ______ 

What is the shape of the wavefront on Earth for Sunlight?

In Young’s double-slit experiment, if there is no initial phase difference between the light from the two slits, a point on the screen corresponds to the 5th minimum. What is the path difference? 

Why two light sources must be of equal intensity to obtain a well-defined interference pattern?

What is the relation between phase difference and Optical path in terms of speed of light in a vacuum?

State any four Conditions for Obtaining well–defined and Steady Interference Patterns. 

Draw a neat labelled ray diagram of the Fresnel Biprism experiment showing the region of interference. 

Explain the reflection of light at a plane surface with the help of a neat ray diagram. 

Explain constructive and destructive interference with the help of a diagram?

Plane wavefront of Light of wavelength 6000 Å is incident on two slits on a screen perpendicular to the direction of light rays. If the total separation of 10 brights fringes on a screen 2m away is 2 cm, find the distance between the slits.

With the help of a neat diagram, explain the reflection of Light on a plane-reflecting surface.

Two tuning forks of frequencies 320 Hz and 340 Hz are sounded together to produce a sound wave. The velocity of sound in air is 326.4 m/s. Calculate the difference in wavelengths of these waves.

Explain the construction and propagation of a spherical wavefront using Huygens's principle.

In biprism experiment, the distance of 20^th bright band from the central bright band is 1.2 cm. Without changing the experimental set-up, the distance of 30^th bright band from the central bright band will be ______.

The fundamental frequency of an air column in a pipe closed at one end is in unison with the third overtone of an open pipe. Calculate the ratio of lengths of their air columns

If sound waves are reflected from surface of denser medium, there is phase change of.......

Hence show that the distance between node and adjacent antinode is λ/4