Related Questions

Atoms generate rays of light ---?
A they are infrared
B they become warm
C due to constant motion
D they are active
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
When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as
A Isomers
B Isotopes
C Isobars
D Isotones
The green light only ever goes on when tank A is full and tank C isn't empty. The red light is always on unless either tank A isn't Full or tank B is empty. Given that the green light is on, we can conclude all of the following EXCEPT---
A Tank A cannot be empty
B The red light must be on
C Tank C cannot be empty
D we don't have enough information to determine whether tank B is empty or not
The surface of a certain planet reflects 80 percent of the light that strikes it. The clouds around the planet then absorb 40 percent of the reflected light. What percent of the light that strikes the planet is reflected from the surface and passes through the clouds without being absorbed?
A 32%
B 40%
C 48%
D 60%
Light: Rays: Sound?
A Waves
B Audio
C Pitch
D Hear
some interesting facts about your past have just come to light . Here 'come to light' means _____ .
A go near to light
B to become known
C to realize
D to lit a light
After the first photons of light are produced, which process is responsible for amplification of the light?
A Blackbody radiation
B Stimulated emission
C Planck's radiation
D Einstein oscillation
Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has
A High neutron absorption cross-section
B Low moderating efficiency
C High neutron scatter cross-section
D Low neutron absorption cross-section
Which of the following characteristics of light remains unchanged when light travels from vaccum enters water?
A Speed
B Amplitude
C Frequency
D Wavelength

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