YEAR 10 PHYSICS REVISION
1.
What is the wavelength of light that has a frequency of 1450 Hz?
2.
List 4 types of electromagnetic radiation.
3.
Determine the angle at which the refracted ray coming from a block of flint glass
into air will shine along the surface of the glass.
4.
The image seen in a concave mirror is always real. Comment on this statement.
5.
State the law of reflection for a plain mirror.
6.
TRUE or FALSE? The focal length of a mirror is equal to 2 times the radius of
curvature of the mirror.
7.
An object is placed 6 cm in front of a convex mirror which has a focal length of
11 cm. Draw a diagram to locate the image and describe it.
8.
A beam of blue light (wavelength = 432 nm) enters a glass plate (n = 1.56) with
an incident angle of 30o. What is the speed of the beam in the glass? What is the
frequency of the light inside the glass? What is the wavelength of the light wave
inside the glass? What is the angle of refraction?
9.
A converging lens with a 25 cm focal length forms an image of a 7 cm high object
placed 40 cm from the lens. Use the lens equation and a diagram to find the
position of the image. How high will the image be?
10.
Through what surface area can a fish see if it is 6 m deep in the sea (nsw = 1.38)
11.
How far must an object be placed behind a convex lens of focal length 8 cm in
order that the image is magnified 3 times and remains upright?