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Optics
In a double slit experiment two interference patterns are seen on the screen.One pattern is due to light of wavelength 500nm and second pattern is due to light of wavelength 400nm. The distance between the slits is 2.5mm and the distance of screen from slits is 1m . The separation on the screen between the fifth order (m=5) bright fringes of two interference patterns will be
Ans: 0.2mm
Ans: 0.2mm
Optics
A 2.0cm high object is placed on the principle axis of concave mirror at a distance of 12cm from the pole.If the image is inverted real and 5.5cm high then the focal length of the mirror
Optics
A convex lens forms a real image of a point object at a distance of 50 cm from the convex lens lens of the image side on placing a plane Mirror on the image side and facing the convex and it is observed that the final image now concepts with objects itself the focal length of the concave lenses
Optics
Some restaurants cover an entire wall with a large, plane mirror. What effect does this mirror have on
the appearance of the restaurant? Why might restaurants choose to use this strategy?
the appearance of the restaurant? Why might restaurants choose to use this strategy?
Optics
what is meant by the angle of minimum deviation?
Optics
what is meant by the angle of deviation?
Optics
A plano convex lens of focal length 25cm is to be made with crown glass of refractive index 1.52. calculate the radius of the curvature of the grinding and polishing tools to be used in the lens
Optics
When a thin film of a transparent material of refractive index 1.5 for wavelength 5890 Å is inserted in one of the arms of a Michelson's interferometer, a shift of 65 circular fringes is observed. Calculate the thickness of the film.
Optics
Solve the question one in exercise one
You stand on the edge of a canyon 420 m and clap your hands; the echo comes back to you 2.56 sec later. What is the temperature of the air? (γ_air=1.40 and M=28.8gm)
Solution
The speed of sound in a gas is v=√(β/ρ)=√(γRT/M)
⇒T=(Mv^2)/γR=[(2.88×10^(-2) kg)(328 m/s^2 )]⁄([(1.4)(8.31)]=266K=-7℃)
You stand on the edge of a canyon 420 m and clap your hands; the echo comes back to you 2.56 sec later. What is the temperature of the air? (γ_air=1.40 and M=28.8gm)
Solution
The speed of sound in a gas is v=√(β/ρ)=√(γRT/M)
⇒T=(Mv^2)/γR=[(2.88×10^(-2) kg)(328 m/s^2 )]⁄([(1.4)(8.31)]=266K=-7℃)
Optics
In a Young's double slitexperiment m(th) order and n(th)order of bright fringes are formed at point P on a distant screen if monochromatic source of wavelength 400nm and 600nm are used respectively.The minimum value of m and n are respectively
