Interference waves

Grating element is equal to

• nλ/sinθ

• nλ

• sinθ

• cosθ

In an interference experiment, two slits are illuminated with white light. What is seen on the screen

• The central fringe is white with black and white fringes on each side.

• The central fringe is black with black and white fringes on each side.

Which of the following is a longitudinal wave?

• a light wave travelling through air

• a radio wave from a broadcasting station

• a ripple on the surface of water

• a sound wave travelling through air

If w > λ , then

• diffraction occur

• no diffraction

If w < λ , then

• diffraction occur

• no diffraction

This pattern for the ...

• Double slit

• Single slit

This pattern for the . . .

• Single slit

• Double slit

The path difference between these two waves is ________.

• 0 waves

• 1 wave

• 2 waves

• 3 waves

These two waves would ______ interfere and cause the brightness to be at a _____.

• constructively, minima

• constructively, maxima

• destructively, minima

• destructively, maxima

In Young's Double slit experiment, two adjacent bright fringes are 0.5 cm apart. The distance between two dark fringes ______.

• is less than 0.5 cm

• is greater than 0.5 cm

• is exactly 0.5 cm

• is dependent on which order is observed.