WorksheetsPhysics-13 Lens and Electromagnetic waves
Total questions: 19
Worksheet time: 12mins
When light waves move from passing through air to passing through a glass lens what happens to them?
They slow down and change direction
They speed up and change direction
They maintain the same speed and change direction
They maintain their same speed and direction
Which part of the eye is this?
Retina
Iris
Vitreous Humor
Cornea
When an object is placed between the focal point and the optical centre of the convex lens, the image produced is ___.
real, diminished, and inverted
real, enlarged, and inverted
virtual, enlarged, and erect
virtual, diminished and erect
Bends light rays away and spreads them out. Make objects appear smaller.
Convex Lenses
Concave Lenses
Convex Mirrors
Concave Mirrors
A person with CONCAVE GLASSES(lenses) are:
(Concave lenses spread the light before it enters the eyes so that the image is focused on the retina)
Short-Sighted
Long-Sighted
A person with CONVEX GLASSES(lenses) are:
(Convex lenses concentrates the light before it enters the eyes so that the image is focused on the retina)
Short-Sighted
Long-Sighted
Infrared was discovered by whom and what year?
William Herschel – 1800
William Herschel – 1840
William Thomson – 1860
William Crookes – 1810
What is the energy beyond the violet end of the visible spectrum?
Infrared
X-rays
Gamma Rays
Ultraviolet
Used for medical imaging to diagnose health issues in bones and teeth
visible light
ultraviolet rays
x-rays
gamma rays
Reorder the following according to the spectrum
yellow
green
blue
indigo
violet
Scientists observed a celestial object emitting a wavelength of 3 x 103m. What type of telescope did the scientists have to use to view this?
Radio wave
Infrared ray
X-ray
Gamma Ray
How do humans detect infrared light?
as heat
with a prism
with special glasses
through a telescope
Which type of electromagnetic waves have the greatest energy and is used to treat cancer by destroying cancer cells?
gamma rays
microwaves
radio waves
visible light
Visible light is part of the electromagnetic spectrum humans can detect. It can be broken into different colors. Looking at the chart, which color has the greatest energy?
violet
red
green
yellow
Reorder the following types of radiation in order of increasing energy
radio waves
infrared
visible light
x rays
gamma rays
What is frequency?
the length between two identical points on adjacent waves
the speed of gravitational acceleration between two waves
how much work a photon particle can exert
how many wavelengths pass a point in a second
