Daniel Vlk
Department of Biophysics
16 - Exercises
* Energy of photons can be expressed:
* a) E = 1/2mv2
* b) E = mgh
* c) E = hc/λ
* d) E = hfc/λ
* Electromagnetic radiation wavelength 2.10-11m represent
* a) x-rays
* b) gamma rays
* c) UV
* d) VIS
* Electromagnetic radiation wavelength 2.10-4m cannot represent:
* a) radio waves
* b) microwaves
* c) ultrared waves
* d) visible light
Electromagnetic radiation has a frequency 10MHz. Calculate its energy and wavelenght
Electromagnetic radiation has a wavelength 30cm. Calculate its energy and frequency.
Foton has a frequency 8x 1014Hz. Calculate its energy and wavelenght.
Speed of light in a glass is 140 000km/s. Calculate index of refraction of the glass.
What is speed of light in ethanol? (n=1,28)
Could be n < 1?
Calculate dioptric power if focal distance is 5m.
Calculate dioptric power if object distance is 20cm and image distance is 40cm.
Dioptric power of a lens is 5D, calculate the object distance if you know that image
distance is 10cm.
You place an object 20cm in front of a convex lens with a 10cm focal length.
Determine the image position
You place an object 50cm in front of a concave mirror with a 10cm radius of the mirror.
Determine the image position.
Image position is 50cm. Concave mirror has 10cm radius of curvation. Determine the
object position.
Calculate linear magnification of a lens, if you know that object height is 20mm and
image height is 5m.
Calculate linear magnification of a mirror, if you know that object distance is 10cm and
focal lenght is 15cm.
An object near a convex lens produces a 3cm tall real image that is 12cm from the lens
and inverted. If the focal distance (lenght) of the lens is 7cm, what are the object
position and height?
An object near a concave mirror produces a 15cm tall real image that is 24cm from the
mirror and inverted. If the radius of the mirror is 8cm, what are the object position
and height?
* Chromatic aberration is caused by:
* a) thick lenses
* b) light dispersion
* c) focal distances
* d) wavelength used light