Optics Answers

Calculate the magnitude of the faintest object that can be detected by an optical
telescope of diameter 5.0 m.

Calculate the magnitude of the faintest object that can be detected by an optical
telescope of diameter 5.0 m.

a point source of light S is placed between concave mirror. The beam of light incident on plane mirror become parallel to optical axis after reflection through the concave mirror. The focal length of concave mirror is 30 cm and the point source is midway between concave mirror and plane mirror. Find the separation between concave mirror and plane mirror

An object is placed 2.4m from a convex lens. It forms an image 12cm from the lens on a screen. A glass slab of thickness 1cm and refractive index 1.5 is introduced between the lens and screen. By what distance should the object be moved so that the image is in focus?

Red light with a wavelength of 725 nm shines through a single slit, and forms a pattern on a screen placed 1.25 m away. If the width of the slit is 18.5 micrometers, find the width of the central maximum (a) in degrees and (b) in centimeters.

Phosphorescence refers to
1)optical absorption
2)fluoresence
3) delay fluoresence
4) emission of light

Unpolarized light passes through two polaroids, the axis of one is vertical and that of the other is 60 degrees to the vertical. (a) what is the orientation and intensity of the transmitted light. (b) which happens if a third polaroid, with axis 45 degrees to each of the other two, is placed in between

Find the polarizing angle of a dense flint glass having an index of 1.768

Your teacher gives you a piece of cardboard with two pinholes on it, saying that they are separated by 205 μm ± 3%. In order to test this, you set up a double slit apparatus with the screen at a distance of 3.00 m away from the cardboard. You use a helium-neon laser (wavelength 638.2 nm) to generate an interference pattern. You measure the distance from the first to the seventh nodal line to be 56.9mm. Did your teacher give you accurate value for the separation of the pinholes?

Red light with a wavelength of 725 nm shines through a single slit, and forms a pattern on a screen placed 1.25 m away. If the width of the slit is 18.5 micrometers, find the width of the central maximum (a) in degrees and (b) in centimeters.