Please select a subject first
Advertisements
Advertisements
Write the range of wavelength of the ultraviolet spectrum.
Concept: undefined >> undefined
Write the range of wavelength of the infrared spectrum.
Concept: undefined >> undefined
Advertisements
Suggest one way, in each case, by which we can detect the presence of Infrared radiations.
Concept: undefined >> undefined
Sunlight entering through a narrow aperture falls on a prism. Draw a neat labelled ray diagram to show the formation of the spectrum on a screen. Name the colour obtained nearer the base of the prism.
Concept: undefined >> undefined
In the figure, a beam of light consisting of three colours blue, red, and yellow is incident on a prism and on a rectangular glass block respectively. Complete the diagram by drawings of the refracted and emergent rays.
Concept: undefined >> undefined
In the figure, a beam of light consisting of three colours blue, red, and yellow is incident on a prism and on a rectangular glass block respectively. Complete the diagram by drawings of the refracted and emergent rays.
Concept: undefined >> undefined
In the diagram, a narrow beam of white light is incident on a right-angled isosceles prism. The critical angle of the material of prism for the yellow colour of white light is 45°. Complete the diagram to show the path of blue, yellow, and red colours of white light till they emerge out of the prism.
Concept: undefined >> undefined
Define the term Frequency (as applied to sound waves)
Concept: undefined >> undefined
Point out the waves from the given list, i.e., light, sound, radio waves, ultrasonic waves, and thermal radiation, the energy is propagated by mechanical waves.
Concept: undefined >> undefined
Write the approximate value of the speed of sound in air.
Concept: undefined >> undefined
Write the approximate value of the speed of sound in water.
Concept: undefined >> undefined
Write the approximate value of the speed of sound in iron.
Concept: undefined >> undefined
Mention two properties of a wave, one property which varies and the other which remains constant when the wave passes from one medium to another.
Concept: undefined >> undefined
What is meant by echo depth sounding?
Concept: undefined >> undefined
Why will an echo not be heard when the distance between the source of the sound and the reflecting surface is 10 m?
Concept: undefined >> undefined
How are bats able to fly in the dark?
Concept: undefined >> undefined
What do you understand by the ‘Echolocation system of Dolphins’?
Concept: undefined >> undefined
State two factors on which the natural frequency of a body depends.
Concept: undefined >> undefined
