Optics Answers

Ordinary white passes through a diffraction grating having 10,000 slits per centimeter, i.e. a slit separation of d = 1.00 X 10-6 m, and casts a diffraction pattern on a screen. You measure the angular separation between the central white fringe and the blue stripe in the first (m = 1) rainbow as 23.6 degrees. From this information, calculate the wavelength of blue light.

the slit increased,the separation distance between two consecutive bright bonds will decreases.Explain?

what is bragg,s law

It is desired to cast the image of a lamp magnified 5 times upon a wall 4 m distant from the lamp. What kind of spherical mirror is required and what is its position?

How is focal length related to converging power of a convex lens?

A planoconvex lens is made of refractive index 1.5 . The radius of curvature of its spherical surface is 40cm . At what distance from the lens will a parallel beam of light will get focussed ? Draw a neat diagram to show the image formation from the lens . What will be the nature and power of a combination of two such lenses kept with their (a) - plane surfaces in contact. (b) - spherical surfaces in contact

What is the wavelength of a wave having a frequency of 5.76 x 1012 s-1?

Theoretically: if you and I were driving at the speed of light and I turned on the headlights would we notice any change?

A planoconvex lens is made of glass of refractive index 1.5. The radius of curvature of its spherical
surface is 40 cm. At what distance from the lens will a parallel beam of light will get focussed?
Draw a neat, clear labelled ray diagram to show image formation from the lens. What will be the
nature and power of a combination of two such lenses kept with their (i) plane surfaces in contact
(ii) spherical surfaces in contact.

A planoconvex lens is made of glass of refractive index 1.5. The radius of curvature of its spherical surface is 40 cm. At what distance from the lens will a parallel beam of light will get focussed? Draw a neat, clear labelled ray diagram to show image formation from the lens. What will be the nature and power of a combination of two such lenses kept with their (i) plane surfaces in contact (ii) spherical surfaces in contact.