What does the Snell’s law relate?
Light reflection
Light refraction
Light transmission
Light Absorption
Which of the following properties is a characteristic of the light waves from a laser?
The waves all have the same frequency
The waves are all in step with one another
The waves form a narrow beam
All of the above are true
What principle is responsible for light spreading as it passes through a narrow slit?
polarization
diffraction
refraction
interference
In a Young's double slit experiment, if the separation between the slits decreases, what happens to the distance between the interference fringes?
It remains the same
It increases
It decreases.
There is not enough information to determine.
Light appears to travel in a straight line because
wavelength of light is vey small
frequency of light is very small
light consists of very small particles
velocity is different for different colours
When does the phenomenon Luminescence happen?
Photons emit while excited electrons drops down
Knocking out of electrons by photons
Photons stimulated by photons
All
What is the basis of the working of pyrometer?
Laser technology
Photo-conduction
Thermal emission
Tyndall effect
Which of the following is most correct? Corpuscular theory could not explain the phenomenon _______, ________ and __________.
reflection, interference, and diffraction
refraction, polarization, and diffraction
reflection, refraction and interference
interference, diffraction and polarization
On the basis of which technology does Solar cell work?
Which of the following is most correct for a luminous object ?
gives off a dim blue-green light in the dark.
produces light of its own by any method.
shines by reflected light only, such as the moon.
an object that glows only in the absence of light.
