Related Questions

Sound travels fastest in which of the following mediums?
A solid matter
B vacuum
C liquids
D gases
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%
When a beam of white light is allowed to fall on a prism, the maximum deviation of the emerging light occurs for
A red light
B violet light
C yellow light
D blue light
The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.
A Sum
B Difference
C Product
D Ratio
The respective ratio between the speed of a speed of the car, bus and train is 5 : 9 : 6. The average speed of the car, bus and train is 72 km/hr together. What is the average speed (km/h)of the car and the train together?
A 82
B 72
C 67
D 84
Which of the following characteristics of light remains unchanged when light travels from vaccum enters water?
A Speed
B Amplitude
C Frequency
D Wavelength
একটি ধাতুর ওপর সবুজ আলো আপতিত হলে ফটোইলেক্ট্রন নির্গত হয়। নিচের কোন বর্ণের আলো আপতিত হলে ঐ তল থেকে অবশ্যই ফটোইলেক্ট্রন নির্গত হবে? (A metal surface emits photoelectrons when illuminated by green light. Illumination with which of the following colour of light will definitely cause photoelectrons to be emitted from the surface?)
A লাল (Red)
B হলুদ (Yellow)
C নীল (Blue)
D কমলা (Orange)
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
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

Next steps