The entrance to a boy's bedroom consists of two door-ways, each 1.0 m wide, which are...

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The entrance to a boy's bedroom consists of two door-ways, each 1.0 m wide, which are separated by a distance of 3.0 m. The boy's mother yells at him through the two doors as shown, telling him to clean up his room. Her voice has a frequency of 400 Hz. Later, when the mother discovers the room is still a mess, the boy says he never heard her telling him to clean his room. The velocity of sound is 340 m/s. Find all the angles at which no sound will be heard in the bedroom when the mother yells. Assume sound is completely absorbed when it strikes a bedroom wall. -11 3.0 m 1.0 m 5.0 m 1.0 m 8.0 m The entrance to a boy's bedroom consists of two door-ways, each 1.0 m wide, which are separated by a distance of 3.0 m. The boy's mother yells at him through the two doors as shown, telling him to clean up his room. Her voice has a frequency of 400 Hz. Later, when the mother discovers the room is still a mess, the boy says he never heard her telling him to clean his room. The velocity of sound is 340 m/s. Find all the angles at which no sound will be heard in the bedroom when the mother yells. Assume sound is completely absorbed when it strikes a bedroom wall. -11 3.0 m 1.0 m 5.0 m 1.0 m 8.0 m