Diffraction
1. This question is about the measurement of the wavelength of laser light.
The light is shone onto a diffraction grating at normal incidence.
The light transmitted by the diffraction grating produces five spots on a screen. These spots are labelled P to T as shown in the diagram below.
A student uses a meter ruler with 1 mm divisions to take readings. She uses these readings to obtain the measurements x, y and z the distances between centres of the spots.
The table shows her measurements and her estimated uncertainties.
Measurement | Distance / mm | Uncertainty / mm |
x | 289 | 2 |
y | 255 | 2 |
z | 544 | 2 |
The distance between the centres of spots P and R and the distance between the centres of R and T are equal.
That is:
x + y = z
What is the percentage uncertainty in the sum of x and y?
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
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