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124λ তরঙ্গদৈর্ঘ্যের এক রঙা এক্সরে একটি কার্বণ ব্লক দ্বারা বিক্ষিপ্ত হয়। 180° তে এক্সবের বিক্ষিপ্ত বিকিরণের তরঙ্গদৈর্ঘ্যের মান নির্ণয় কর।(A monochromatic X-rays of wavelength 0.124λ is scattered by a carbon block. Find the wavelength of X-rays scattered through 180°) 
A 0.0484 λ
B 0.1724 λ
C 0.0756 λ
D 0.0242 λ
E 0.0968 λ
The popular notion that a tree's age can be determined by counting number of internal rings in its trunk is generally true. Howeevr, to help regulate the internal temperature of the tree, the outermost layers of wood of the Brazilian ash often →peel away when the temperature exceeds 95 degrees Fahrenheit, leaving the tree with fewer rings than it would otherwise have. So only if the temperature in the Brazilian ash's environment never exceeds 95 degrees Fahrenheit →elav eing the tree with fewer rings than it would otherwise have. So only if the reliable measure of the tree's age. Which of the following is an assumption on whish the argument above depends?
A The growth of new rings in a trees is not a function of levels of precipitation.
B Only the Brazilaian ash loses rings because of excessive heat.
C One day of temperatures above 95 degrees Fahrenheit will cause the Brazilian ash to lose one ring.
D The internal rings of all tress are of uniform thickness
Which one of the following is tropical grassland?
A Savannah
B Taiga
C Pampas
D Prairies
Which of the following is tropical grassland?
A Savannah
B Pampas
C Prairies
D Taiga
Postaz are temperate grassland in ________
A Australia
B South Africa
C Hungary
D Egypt
What is the name of the temperate grassland of South America?
A Pampas
B Prairies
C Veld
D Savanna
The Veld grassland of South Africa experiences ________
A The Continental Savanna Climate
B The Maritime Savanna Climate
C The Steppe climate
D The Tropical desert climate
Llanos are the grassland of
A Guyana highland
B Brazilian highland
C Argentina
D Chile
The word 'scattered'means-
A To throw something any how
B To drop something vertically
C To arrange something carefully
D To spread something sideways
The part radiation due to scattered/diffused radiation entering the field of view of a remote sensor other than that from the required target,
A Reduces the contrast of the image and also its sharpness
B Increases the contrast of the image but reduces the sharpness
C Increases both the contrast and sharpness
D Reduces the contrast but increases the sharpness

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