2947

Physics Ray Optics Level: High School

Lenses

Find the image position and magnification when an object is placed .

a) 30 cm from a converging lens of focal length 20 cm .

b) 10 cm from a diverging lens of focal length 15 cm .

Are the image real or virtual , erect or inverted ?



2946

Physics Ray Optics Level: High School

Refraction through a prism

A glass prism of refractive index 1.5 has a refracting angle of 45 degree , Calculate the angle of minimum deviation and the angle of incidence for which this occurs .



2945

Physics Ray Optics Level: High School

Refraction

The light beam shown in the figure at “click here” makes an angle of 20 degree with the normal line NN’ determine the angle theta and theta .



2944

Physics Ray Optics Level: High School

Refraction

A fish in a pond is 3 cm below the surface .

a) What is the apparent depth of the fish for a fisherman in a boat directly above ?

b) What is the apparent depth for the fisherman that makes an angle of theta = 20 degree with the normal , when looking at where the fish appears to be . Assume that the image is above the fish (as seen in the figure at “click here”) (n water = 1.33 , n air = 1)




2943

Physics Ray Optics Level: High School

Lenses

Two lenses are made from fused quartz , n = 1.46 . The first lens is a double convex lens with the magnitude of the focal length equal to 52 cm . The second lens is a double concave with the magnitude of the focal length equal to 23 cm . The converging lens is placed 15 cm to the left to the diverging lens . A real object is placed 45 cm to the left of the converging lens .

a) Calculate the radius of the curvature of the surface of the converging lens .

b) Calculate the position of the final image with respect to the diverging lens .

c) Calculate the final (total) magnification .

d) Is the final image real or virtual ? Inverted or the same orientation as the object ?




2941

Physics Ray Optics Level: High School

Relativity

C) An electron (m = 9.1 e -31 kg ) has a speed of .95c . Its kinetic energy is ?




2940

Physics Ray Optics Level: High School

Convex Lens

A) In a cinema , a picture 2.5 cm wide on the film is projected to an image -++3.0 m wide on a screen which is 18 m away . What is the focal length of the lens ?




2939

Physics Ray Optics Level: High School

Interference

B) In a double-slit experiment , light of wavelength 500 nm illuminates two slits that are separated by 1 mm . The separation between adjacent fright fringes (close to the center) on a screen 5 m from the slits is what distance ?




2938

Physics Ray Optics Level: High School

Convex Mirror

At an intersection of hospital hallways , a convex mirror is mounted high on a wall to help people avoid collisions . The mirror has a radius of curvature of 0.559 m . Locate the image of a patient from 29.7 m the mirror . Answer in units of m .

a) Find the magnification .

b) Describe the image ,

1) real , inverted , smaller

2) virtual , inverted , smaller

3) virtual, upright , smaller

4) virtual , upright , larger

5) None of the these

6) real, upright , larger

7) virtual, inverted, larger

8) real, upright, smaller

9) real , inverted, larger




2937

Physics Ray Optics Level: High School

Concave Mirror

A concave mirror has a radius of curvature of 1.61 m . Calculate the position of the image produced when an object is placed 2.35 m from the mirror . Answer in units of m .

a) Calculate the piston of the image when an object is placed 0.478 from the mirror . Answer in units of m .




2936

Physics Ray Optics Level: High School

What causes refraction ?

1) the existence of different colors of light .

2) none of the above

3) the difference in the speed of light in different transparent media

4) the speed of light being higher than c in some media .

5) reflection

3) the difference in the speed of light in different transparent media .



2935

Physics Ray Optics Level: High School

Refraction

The wavelength of red light in air is 530 nm . What is its frequency ? Answer in units of Hz .

a) What is its wavelength in glass that has an index of refraction of 1.5 ? Answer in units of nm .

b) What is its speed in the glass ? Answer in units of m/s .




2934

Physics Ray Optics Level: High School

Refraction

When red passes from air into water . the frequency of the light remains the same . What happens to the speed and the wavelength of the light as it crosses the boundary in going from air into water ?



2933

Physics Ray Optics Level: High School

Speed of Light

The index of refraction of crown glass for violet light is 1.535 , while for red light it is 1.509 . What is the speed of violet light in crown glass ? Answer in units of m/s .

What is the speed of the red light in crown glass ? Answer in units of m/s .




2932

Physics Ray Optics Level: High School

Convex Mirror

A converging lens of focal length 0.186 m forms a virtual image of an object . The image appears to be 0.947 m from the lens on the same side as the object . What is the distance between the object and the lens ? Answer in units of m .

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