Find what focal length lens should be used

Reference no: EM13518055

A person on a safari wants to take a photograph of a hippopotamus from a distance of 78.8 m. The animal is 4.90 m long and its image is to be 1.24 cm long on the film.

(a) What focal length lens should be used?

___mm

(b) What would be the size of the image if a lens of 50.0-mm focal length were used?

___ mm

___ m

Reference no: EM13518055

Questions Cloud

Explain what is the concentration of hydroxide ions : 8.00×10^-3mol of HBr are dissolved in water to make 14.0L of solution. What is the concentration of hydroxide ions,[OH-] , in this solution and 4.00g of NaOH are dissolved in water to make 2.00L of solution. What is the concentration of hydronium ..

Find the electric flux through each of the six faces of cube : A point charge of magnitude q is at the center of a cube with sides of length L. find the electric flux through each of the six faces of the cube

Explain chlorine in a reactor at a certain temperature : Chemists studied the formation of phosgene by sealing 0.81 atm of carbon monoxide and 1.37 atm of chlorine in a reactor at a certain temperature. The pressure dropped smoothly to 1.55 atm as the system reached equilbrium. Calculate Kp (in atm-1) f..

Explain the functions of financial markets : Explain the functions of financial markets and discuss why a dollar tomorrow cannot be worth less than a dollar the day after tomorrow.

Find what focal length lens should be used : A person on a safari wants to take a photograph of a hippopotamus from a distance of 78.8 m. The animal is 4.90 m long and its image is to be 1.24 cm long on the film. What focal length lens should be used

Explain the molar concentration and molal concentration : Concentrated sulfuric acid is 98% by mass H2SO4, with the remaining mass being water. What is the molar concentration (i.e., molarity) and the molal concentration (i.e., molality)

Find how close was kim to the president : Kim says that she was less than 10 ft away from the president when she took a picture of him with her 53-mm focal length camera lens. How close was Kim to the president when she took the picture

Explain an ammonia/ammonium buffer solution contains : An ammonia/ammonium buffer solution contains 0.19M NH3 and 0.61M NH4+. The Kb value of ammonia is 1.8 x 10^-5 . Calculate the pH of this buffer.

Compute go for 1 moles of electrons : Calculate ?Go (in J) for 1 moles of electron(s) in each half-reaction and a standard potential of 0.27 V.

User Account

All Pages