Question

একজন গাড়ি চালক 100 মিটার দূর থেকে সিগন্যাল লাল হতে দেখে গাড়ি থামালেন এবং সিগন্যাল সবুজ হওয়াতে গাড়ি চালাতে শুরু করে । এক্ষেত্রে কিভাবে তার চোখের উপযোজন ঘটলো শব্দছকের মাধ্যমে দখাও।​

Answer 1

Answer:

দূরের বস্তু দেখার খেত্রে উপযোজন:

সিলিয়ারি পেশির শিথিলীকরণ,

সাসপেন্সরি লিগামেনটের ওপর সর্বাধিক টান,

লেন্স সরু বা পাতলা হয়,

লেন্স এর ফোকাস দৈর্ঘ্য এর বৃদ্ধি ঘটে,

দূরের বস্ত দেখার খেত্রে চোখ অভিযোজিত হয়।

Hope you will understand..

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Answer 2

We must choose the light that is least scattered by the atmosphere. The law of Rayleigh's scattering relates this scattering to the light's wavelength.

• We utilise the light as a traffic signal in order to stop the vehicles that are travelling along the rod. And for this light to be seen by the human eye, it must be in the visible portion of the electromagnetic spectrum. We are aware that the visible spectrum of light consists of the colours violet, blue, green, yellow, orange, and red. Wavelengths that fall within the visible spectrum range from 400 nm for violet light to 700 nm for red light. As a result, we can see that in the visible spectrum, violet light has the smallest wavelength and red light has the largest.
• The air particles are now in the route from the traffic light to the observer's eye. The light that passes through the air particles is scattered. The signal becomes less visible as a result. Therefore, we must choose the light that is least scattered by the atmosphere. The law of Rayleigh's scattering relates this scattering to the light's wavelength.

Hence, we must choose the light that is least scattered by the atmosphere. The law of Rayleigh's scattering relates this scattering to the light's wavelength.

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