Question

1. In a single slit diffraction experiment the width of a central maximum on a screen is:

Twice as broad as the width of second maximum

Twice as narrow as the width of the second maximum

Same width as the width of second maximum

Answer depends on the distance to the screen

2.Red laser is illuminating three sets of single-slits, one after another. The wavelength of a laser is 633 nm, the widths of slits are: 1500 nm; 900 nm; 600 nm. Which of these systems produces broader diffraction pattern on a screen?

900 nm

600 nm

1500 nm

All slits produce the same pattern on the screen

3.You examine two tiny closely positioned objects using the optical microscope. To increase the optical resolution of microscope you can:

Switch to bigger lens and blue light

Switch to bigger lens and red light

Switch to red light and smaller lens

Switch to blue light and smaller lens

4.You illuminate the surface of some metal with green laser and see the photocurrent in a circuit. You can predict that red laser

may or may not create photocurrent in this circuit

will certainly create photocurrent in this circuit

will definitely not create photocurrent in this circuit

The answer depends on intencity of lasers

5.In some conditions electron can have de Broglie wavelength as big as 540 nm. 540 nm wavelength corresponds to electromagnetic wave of green light. Does it mean that electron with such wavelength looks green?

No because looking green in the property of e/m wave only

Yes, bcause all waves with such a wavelength look green

The color of electron depends on medium in which it moves

Electron never looks green because it always looks yellow, this is why it is called “electron” from the Greek word “amber”.

Answer 1