Related Questions

Scientists have speculated that the destruction of Earth's ozone layer would--------- us to damaging ultraviolet rays.
A exposed
B have been exposed
C expose
D have been exposing
An important gas in the atmosphere that absorbs sun's ultraviolet rays is
A Oxygen
B Nitrogen
C Ozone
D Hydrogen
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in
A Food industry
B Municipal sewage treatment
C Petroleum refinery
D Iron & steel plant
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 wzone in the upper layers of Earth's atmosphere is beneficial, ____ animal and plant life from dangerous ultraviolet readittion
A protecting
B withdrawing
C thwarting
D displacing
Ultraviolet রশ্মির তরঙ্গদৈর্ঘ্য-
A more than 550μm
B 550μm
C Less than 400μm
D Less than 300μm
If the wavelengths corresponding to ultraviolet, visible and infrared radiations are given as lUV, lVIS and lIR respectively, then which of the following gives the correct relationship among these wavelengths?
A lUV < lIR < lVIS
B lUV > lVIS > lIR
C lUV > lIR > lVIS
D lUV < lVIS < lIR
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.
A Hydrogen
B Carbon dioxide
C Ozone
D None of these
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is
A helium
B ozone
C oxygen
D methane
The _____ is ultraviolet-light-erasable and electrically programmable. This allows the user to erase and store until programs and data are perfected.
A EPROM
B ROM
C PROM
D RAM
E None of the above

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