Tag: pinhole camera
Questions Related to pinhole camera
Shadow formation is an example of :
Select the odd one out (shadows, eclipses, expansion, images)
Beam of light incident on a plane forms a real image of reflection. The incident beam is:
What kind of lens is used in making a pinhole camera ?
What is "Camera Obscura" effect ?
A ray of sunlight enters a spherical water droplet $(n = \dfrac{4}{3})$ at an angle of incidence $53^\circ$ measured with respect to the normal to the surface. It is reflected from the back surface of the droplet and re-enters into air. The angle between the incoming and outgoing ray is [Take $\sin \ 53^\circ = 0.8$]
A small plane mirror kept at the centre of a sphere of diameter $3\ m$, makes $12$ revolution per second. A thin light beam is made incident on the mirror. The linear speed of the light spot on the sphere, formed after reflection from the mirror is :
Intensity of light due to a point source at a distance $2m$ is $20$ units. The intensity due to the same source at a distance of $4m$ is