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WorksheetsWeekend exam_Physics
Total questions: 25
Worksheet time: 13mins
The light ray falling on a surface is called
Refracted ray
Normal ray
Incident ray
all of these
According to laws of reflection, a light ray striking a mirror
Continues moving through the mirror in the same direction
moves into the mirror at a slightly different angle
bounces off the mirror toward the direction it came from
bounces off the mirror at the same angle it hits
The line 90 degrees through the refracting or reflecting surface is called?
Medium
Normal ray
Reflection
Incidence
Glass has a_________ index of refraction than air.
Less
Impossible to say
Greater
Equal
What might explains why light travels in a straight line?
Light waves travel in a straight line because sound waves travel in a straight line
Light waves don't travel in a straight line
Light waves will travel in a straight line, even if they come into contact with another object
If there is nothing to interfere with light waves, they should travel in A straight line
What is the angle of reflection equal to?
The angle of refraction
The angle of absorption
The angle of light
The angle of incidence
What is the angle of incidence?
The angle at which light bends in water
The angle at which light hits a surface
The angle at which light bounces off a surface
The angle at which light is absorbed by an object
Why does the straw appear to be bent?
light is reflected
Light is absorbed
Light is turned
Light is refracted
Why do we call a material that light can travel through
air
medium
pathway
water
Why does the part of our body in water appear so much different in size from the upper part ?
The light rays that travel through air and then into water are reflected
The light rays that travel through air and then into water are reduced
The light rays that travel through water and then into air are refracted
The light rays that travel through water and then into air are enlarged
What is the angle of reflection if angle of incidence is 56 degrees?
124 degrees
90 degrees
56 degrees
34 degrees
Light bending as it passes through a rain drop is an example of
Reflection
refraction
total internal reflection
None
A light ray travels from air into a glass block. Which is true among following?
It undergo refraction twice
it undergo refraction once
No refraction takes place
reflection takes place
Density is________
the amount of mass in a given space
the amount of mass in an object
the amount of space on object takes up
the weight of an object
What is repeating disturbance or vibration that transfer or moves energy from place to place?
Wave
Refraction
Medium
Compression
A beam of light bends when it passes from air into water, and more when it passes from water into glass . What can you conclude from this face?
Air is denser than water
Air is denser than glass
Water is denser than glass
Glass is denser than water
What is the refractive index of a fibre optic pipe if the critical angle is 30 degrees? Outside is air
1.7
2
2.4
3.4
What happens to light during total internal reflection?
The angle of incidence is zero
The angle of incidence is greater than the critical angle
The angle of refraction is less than the critical angle
The angle of reflection is the same as the critical angle
If angle of incidence is equal to critical angle then
Ray grazes through interface
ray reflects
ray refracts
None of the above
___________ cables trans, it beams of light without allowing any of the light to escape until it goes to the end of the cable.
Ethernet
Fiber optic
Coaxial
None
Absolute refractive index of any medium is always______
1
0
greater than 1
less than 1
When angle of incidence equals to critical angle if light is travelled from a denser medium to a less dense medium,___--
angle of refraction is equal to 90 degrees
light travel in straight line
total internal reflection occurs
light is refracted out
The refractive index of a glass prism is 1.9. determine the critical angle
32 degrees
35 degrees
25 degrees
23 degrees
Mirage formation is an application of _______
Reflection
Refraction
Total internal reflection
None of the above
What is the most prominent use of Fiber Optics today?
Phones
The internet
Television Screens
MRI imaging
